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213030360020 = 22510651518001
BaseRepresentation
bin1100011001100110011…
…0010101001111010100
3202100212110012120002002
43012121212111033110
511442241233010040
6241510443534432
721251043116552
oct3063146251724
9670773176062
10213030360020
11823890a2585
123535352a418
131711ca9098a
14a44c8b0bd2
15581c3c1a15
hex31999953d4

213030360020 has 12 divisors (see below), whose sum is σ = 447363756084. Its totient is φ = 85212144000.

The previous prime is 213030360001. The next prime is 213030360029. The reversal of 213030360020 is 20063030312.

213030360020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 156121394884 + 56908965136 = 395122^2 + 238556^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10651518001 = 213030360020 / (2 + 1 + 3 + 0 + 3 + 0 + 3 + 6 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 213030359974 and 213030360001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213030360029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5325758981 + ... + 5325759020.

It is an arithmetic number, because the mean of its divisors is an integer number (37280313007).

Almost surely, 2213030360020 is an apocalyptic number.

213030360020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213030360020 is an abundant number, since it is smaller than the sum of its proper divisors (234333396064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213030360020 is a wasteful number, since it uses less digits than its factorization.

213030360020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10651518010 (or 10651518008 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 213030360020 its reverse (20063030312), we get a palindrome (233093390332).

The spelling of 213030360020 in words is "two hundred thirteen billion, thirty million, three hundred sixty thousand, twenty".

Divisors: 1 2 4 5 10 20 10651518001 21303036002 42606072004 53257590005 106515180010 213030360020