23731081920 has 560 divisors, whose sum is σ = 103906490688. Its totient is φ = 5006499840.

The previous prime is 23731081903. The next prime is 23731081931. The reversal of 23731081920 is 2918013732.

It is a tau number, because it is divible by the number of its divisors (560).

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2353690 + ... + 2363750.

Almost surely, 2^23731081920 is an apocalyptic number.

23731081920 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 23731081920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51953245344).

23731081920 is an abundant number, since it is smaller than the sum of its proper divisors (80175408768).

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

23731081920 is a wasteful number, since it uses less digits than its factorization.

23731081920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110 (or 10091 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 23731081920 in words is "twenty-three billion, seven hundred thirty-one million, eighty-one thousand, nine hundred twenty".