23185529320 has 16 divisors (see below), whose sum is σ = 52167441060. Its totient is φ = 9274211712.

The previous prime is 23185529309. The next prime is 23185529329. The reversal of 23185529320 is 2392558132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21415980964 + 1769548356 = 146342^2 + 42066^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 579638233 = 23185529320 / (2 + 3 + 1 + 8 + 5 + 5 + 2 + 9 + 3 + 2 + 0).

It is not an unprimeable number, because it can be changed into a prime (23185529329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289819077 + ... + 289819156.

Almost surely, 2^23185529320 is an apocalyptic number.

23185529320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23185529320 is an abundant number, since it is smaller than the sum of its proper divisors (28981911740).

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

23185529320 is a wasteful number, since it uses less digits than its factorization.

23185529320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579638244 (or 579638240 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 23185529320 in words is "twenty-three billion, one hundred eighty-five million, five hundred twenty-nine thousand, three hundred twenty".