23801931990 has 48 divisors (see below), whose sum is σ = 62300394000. Its totient is φ = 6304579776.

The previous prime is 23801931977. The next prime is 23801932031. The reversal of 23801931990 is 9913910832.

It is a happy number.

23801931990 is a `hidden beast` number, since 238 + 0 + 19 + 319 + 90 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 874060 + ... + 900879.

It is an arithmetic number, because the mean of its divisors is an integer number (1297924875).

Almost surely, 2^23801931990 is an apocalyptic number.

23801931990 is an abundant number, since it is smaller than the sum of its proper divisors (38498462010).

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

23801931990 is a wasteful number, since it uses less digits than its factorization.

23801931990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775101 (or 1775098 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 23801931990 in words is "twenty-three billion, eight hundred one million, nine hundred thirty-one thousand, nine hundred ninety".