23185993728 has 156 divisors (see below), whose sum is σ = 65682318440. Its totient is φ = 7272923136.

The previous prime is 23185993703. The next prime is 23185993757. The reversal of 23185993728 is 82739958132.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3547968 + ... + 3554496.

Almost surely, 2^23185993728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23185993728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32841159220).

23185993728 is an abundant number, since it is smaller than the sum of its proper divisors (42496324712).

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

23185993728 is an equidigital number, since it uses as much as digits as its factorization.

23185993728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6590 (or 6551 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 23185993728 in words is "twenty-three billion, one hundred eighty-five million, nine hundred ninety-three thousand, seven hundred twenty-eight".