123620308920 has 128 divisors (see below), whose sum is σ = 429983769600. Its totient is φ = 31532130432.

The previous prime is 123620308919. The next prime is 123620308939. The reversal of 123620308920 is 29803026321.

123620308920 is a `hidden beast` number, since 1 + 2 + 3 + 620 + 3 + 0 + 8 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2463492 + ... + 2513171.

It is an arithmetic number, because the mean of its divisors is an integer number (3359248200).

Almost surely, 2^123620308920 is an apocalyptic number.

123620308920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123620308920 is an abundant number, since it is smaller than the sum of its proper divisors (306363460680).

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

123620308920 is a wasteful number, since it uses less digits than its factorization.

123620308920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4976706 (or 4976696 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 123620308920 in words is "one hundred twenty-three billion, six hundred twenty million, three hundred eight thousand, nine hundred twenty".