23390165940 has 48 divisors (see below), whose sum is σ = 65499157248. Its totient is φ = 6236740224.

The previous prime is 23390165933. The next prime is 23390165941. The reversal of 23390165940 is 4956109332.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 23390165892 and 23390165901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23390165941) 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, 1026309 + ... + 1048851.

It is an arithmetic number, because the mean of its divisors is an integer number (1364565776).

Almost surely, 2^23390165940 is an apocalyptic number.

23390165940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23390165940 is an abundant number, since it is smaller than the sum of its proper divisors (42108991308).

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

23390165940 is a wasteful number, since it uses less digits than its factorization.

23390165940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39848 (or 39846 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The spelling of 23390165940 in words is "twenty-three billion, three hundred ninety million, one hundred sixty-five thousand, nine hundred forty".