23747281920 has 264 divisors, whose sum is σ = 85335729024. Its totient is φ = 6332276736.

The previous prime is 23747281871. The next prime is 23747281933. The reversal of 23747281920 is 2918274732.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 1234617 + ... + 1253703.

Almost surely, 2^23747281920 is an apocalyptic number.

23747281920 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 23747281920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42667864512).

23747281920 is an abundant number, since it is smaller than the sum of its proper divisors (61588447104).

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

23747281920 is an equidigital number, since it uses as much as digits as its factorization.

23747281920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19127 (or 19097 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 23747281920 in words is "twenty-three billion, seven hundred forty-seven million, two hundred eighty-one thousand, nine hundred twenty".