18816131628 has 96 divisors (see below), whose sum is σ = 57550008320. Its totient is φ = 5202610560.

The previous prime is 18816131591. The next prime is 18816131647. The reversal of 18816131628 is 82613161881.

18816131628 is a `hidden beast` number, since 1 + 8 + 8 + 1 + 6 + 13 + 1 + 628 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378001 + ... + 424872.

Almost surely, 2^18816131628 is an apocalyptic number.

18816131628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18816131628 is an abundant number, since it is smaller than the sum of its proper divisors (38733876692).

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

18816131628 is a wasteful number, since it uses less digits than its factorization.

18816131628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802924 (or 802916 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The spelling of 18816131628 in words is "eighteen billion, eight hundred sixteen million, one hundred thirty-one thousand, six hundred twenty-eight".