23131890432 has 216 divisors, whose sum is σ = 77364059136. Its totient is φ = 6510163968.

The previous prime is 23131890421. The next prime is 23131890443. The reversal of 23131890432 is 23409813132.

23131890432 is a `hidden beast` number, since 2 + 3 + 131 + 8 + 90 + 432 = 666.

It is an interprime number because it is at equal distance from previous prime (23131890421) and next prime (23131890443).

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 23 ways as a sum of consecutive naturals, for example, 1069873 + ... + 1091279.

Almost surely, 2^23131890432 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 23131890432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38682029568).

23131890432 is an abundant number, since it is smaller than the sum of its proper divisors (54232168704).

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

23131890432 is a wasteful number, since it uses less digits than its factorization.

23131890432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21503 (or 21486 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 23131890432 in words is "twenty-three billion, one hundred thirty-one million, eight hundred ninety thousand, four hundred thirty-two".