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10231312020 = 2235170521867
BaseRepresentation
bin10011000011101010…
…10110111010010100
3222102001000111120020
421201311112322110
5131423203441040
64411124305140
7511353501006
oct114165267224
928361014506
1010231312020
114380344176
121b965421b0
13c708b89a7
146d0b76376
153ed34ecd0
hex261d56e94

10231312020 has 24 divisors (see below), whose sum is σ = 28647673824. Its totient is φ = 2728349856.

The previous prime is 10231312009. The next prime is 10231312051. The reversal of 10231312020 is 2021313201.

10231312020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85260874 + ... + 85260993.

It is an arithmetic number, because the mean of its divisors is an integer number (1193653076).

Almost surely, 210231312020 is an apocalyptic number.

10231312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10231312020 is an abundant number, since it is smaller than the sum of its proper divisors (18416361804).

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

10231312020 is a wasteful number, since it uses less digits than its factorization.

10231312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170521879 (or 170521877 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 10231312020 its reverse (2021313201), we get a palindrome (12252625221).

The spelling of 10231312020 in words is "ten billion, two hundred thirty-one million, three hundred twelve thousand, twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 170521867 341043734 511565601 682087468 852609335 1023131202 1705218670 2046262404 2557828005 3410437340 5115656010 10231312020