23775118020 has 72 divisors (see below), whose sum is σ = 72491631576. Its totient is φ = 6307172352.

The previous prime is 23775117991. The next prime is 23775118079. The reversal of 23775118020 is 2081157732.

It can be written as a sum of positive squares in 4 ways, for example, as 2907582084 + 20867535936 = 53922^2 + 144456^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 307447 + ... + 376926.

Almost surely, 2^23775118020 is an apocalyptic number.

23775118020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23775118020 is an abundant number, since it is smaller than the sum of its proper divisors (48716513556).

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

23775118020 is a wasteful number, since it uses less digits than its factorization.

23775118020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684581 (or 684576 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The spelling of 23775118020 in words is "twenty-three billion, seven hundred seventy-five million, one hundred eighteen thousand, twenty".