18377461620 has 72 divisors (see below), whose sum is σ = 63708537984. Its totient is φ = 4200562368.

The previous prime is 18377461573. The next prime is 18377461631. The reversal of 18377461620 is 2616477381.

18377461620 is a `hidden beast` number, since 1 + 8 + 3 + 7 + 7 + 4 + 616 + 20 = 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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7291384 + ... + 7293903.

Almost surely, 2^18377461620 is an apocalyptic number.

18377461620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18377461620 is an abundant number, since it is smaller than the sum of its proper divisors (45331076364).

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

18377461620 is a wasteful number, since it uses less digits than its factorization.

18377461620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14585309 (or 14585304 counting only the distinct ones).

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

The spelling of 18377461620 in words is "eighteen billion, three hundred seventy-seven million, four hundred sixty-one thousand, six hundred twenty".