18761958920 has 32 divisors (see below), whose sum is σ = 42546816000. Its totient is φ = 7445688768.

The previous prime is 18761958907. The next prime is 18761958947. The reversal of 18761958920 is 2985916781.

It is a super-2 number, since 2×18761958920² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1841570 + ... + 1851729.

It is an arithmetic number, because the mean of its divisors is an integer number (1329588000).

Almost surely, 2^18761958920 is an apocalyptic number.

18761958920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18761958920 is an abundant number, since it is smaller than the sum of its proper divisors (23784857080).

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

18761958920 is a wasteful number, since it uses less digits than its factorization.

18761958920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693437 (or 3693433 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 18761958920 in words is "eighteen billion, seven hundred sixty-one million, nine hundred fifty-eight thousand, nine hundred twenty".