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2020013220 = 2235191317599
BaseRepresentation
bin111100001100110…
…1111010010100100
312012210000022012110
41320121233102210
513114110410340
6532235521020
7101025554241
oct17031572244
95183008173
102020013220
11947276915
124845b9170
132626637c4
141523c85c8
15bc517680
hex7866f4a4

2020013220 has 48 divisors (see below), whose sum is σ = 5659315200. Its totient is φ = 538358016.

The previous prime is 2020013147. The next prime is 2020013251. The reversal of 2020013220 is 223100202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2020013196 and 2020013205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105981 + ... + 123579.

It is an arithmetic number, because the mean of its divisors is an integer number (117902400).

Almost surely, 22020013220 is an apocalyptic number.

2020013220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2020013220 is an abundant number, since it is smaller than the sum of its proper divisors (3639301980).

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

2020013220 is a wasteful number, since it uses less digits than its factorization.

2020013220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19524 (or 19522 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2020013220 is about 44944.5571788175. The cubic root of 2020013220 is about 1264.1096225293.

Adding to 2020013220 its reverse (223100202), we get a palindrome (2243113422).

The spelling of 2020013220 in words is "two billion, twenty million, thirteen thousand, two hundred twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 1913 3826 5739 7652 9565 11478 17599 19130 22956 28695 35198 38260 52797 57390 70396 87995 105594 114780 175990 211188 263985 351980 527970 1055940 33666887 67333774 101000661 134667548 168334435 202001322 336668870 404002644 505003305 673337740 1010006610 2020013220