23621891328 has 180 divisors, whose sum is σ = 80499015520. Its totient is φ = 6749070336.

The previous prime is 23621891299. The next prime is 23621891329. The reversal of 23621891328 is 82319812632.

23621891328 is a `hidden beast` number, since 2 + 3 + 621 + 8 + 9 + 13 + 2 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23621891329) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63783 + ... + 226521.

Almost surely, 2^23621891328 is an apocalyptic number.

23621891328 is a gapful number since it is divisible by the number (28) 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 23621891328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40249507760).

23621891328 is an abundant number, since it is smaller than the sum of its proper divisors (56877124192).

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

23621891328 is an equidigital number, since it uses as much as digits as its factorization.

23621891328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162774 (or 162751 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 23621891328 in words is "twenty-three billion, six hundred twenty-one million, eight hundred ninety-one thousand, three hundred twenty-eight".