23128189992 has 96 divisors (see below), whose sum is σ = 64504346400. Its totient is φ = 7480916352.

The previous prime is 23128189957. The next prime is 23128190011. The reversal of 23128189992 is 29998182132.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

Its product of digits (1119744) is a multiple of the sum of its prime divisors (23328).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 998203 + ... + 1021109.

It is an arithmetic number, because the mean of its divisors is an integer number (671920275).

Almost surely, 2^23128189992 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 23128189992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32252173200).

23128189992 is an abundant number, since it is smaller than the sum of its proper divisors (41376156408).

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

23128189992 is a wasteful number, since it uses less digits than its factorization.

23128189992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23335 (or 23328 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The spelling of 23128189992 in words is "twenty-three billion, one hundred twenty-eight million, one hundred eighty-nine thousand, nine hundred ninety-two".