23311492920 has 192 divisors, whose sum is σ = 79842672000. Its totient is φ = 5882367744.

The previous prime is 23311492903. The next prime is 23311492927. The reversal of 23311492920 is 2929411332.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311492927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8610207 + ... + 8612913.

It is an arithmetic number, because the mean of its divisors is an integer number (415847250).

Almost surely, 2^23311492920 is an apocalyptic number.

23311492920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23311492920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39921336000).

23311492920 is an abundant number, since it is smaller than the sum of its proper divisors (56531179080).

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

23311492920 is a wasteful number, since it uses less digits than its factorization.

23311492920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002 (or 3995 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 23311492920 in words is "twenty-three billion, three hundred eleven million, four hundred ninety-two thousand, nine hundred twenty".