23128350940 has 36 divisors (see below), whose sum is σ = 49503354264. Its totient is φ = 9076764736.

The previous prime is 23128350929. The next prime is 23128350943. The reversal of 23128350940 is 4905382132.

It is a self number, because there is not a number n which added to its sum of digits gives 23128350940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23128350943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149662 + ... + 262021.

It is an arithmetic number, because the mean of its divisors is an integer number (1375093174).

Almost surely, 2^23128350940 is an apocalyptic number.

23128350940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23128350940 is an abundant number, since it is smaller than the sum of its proper divisors (26375003324).

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

23128350940 is a wasteful number, since it uses less digits than its factorization.

23128350940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411798 (or 411743 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 23128350940 in words is "twenty-three billion, one hundred twenty-eight million, three hundred fifty thousand, nine hundred forty".