123230656920 has 64 divisors (see below), whose sum is σ = 422505112320. Its totient is φ = 28167007104.

The previous prime is 123230656919. The next prime is 123230656921. The reversal of 123230656920 is 29656032321.

It is an interprime number because it is at equal distance from previous prime (123230656919) and next prime (123230656921).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123230656921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73350742 + ... + 73352421.

It is an arithmetic number, because the mean of its divisors is an integer number (6601642380).

Almost surely, 2^123230656920 is an apocalyptic number.

123230656920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123230656920 is an abundant number, since it is smaller than the sum of its proper divisors (299274455400).

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

123230656920 is a wasteful number, since it uses less digits than its factorization.

123230656920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146703184 (or 146703180 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 123230656920 in words is "one hundred twenty-three billion, two hundred thirty million, six hundred fifty-six thousand, nine hundred twenty".