18599818212 has 24 divisors (see below), whose sum is σ = 48221751200. Its totient is φ = 6199939368.

The previous prime is 18599818121. The next prime is 18599818231. The reversal of 18599818212 is 21281899581.

18599818212 is a `hidden beast` number, since 18 + 599 + 8 + 18 + 21 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 86110162 + ... + 86110377.

Almost surely, 2^18599818212 is an apocalyptic number.

18599818212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18599818212 is an abundant number, since it is smaller than the sum of its proper divisors (29621932988).

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

18599818212 is a wasteful number, since it uses less digits than its factorization.

18599818212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172220552 (or 172220544 counting only the distinct ones).

The product of its digits is 829440, while the sum is 54.

The spelling of 18599818212 in words is "eighteen billion, five hundred ninety-nine million, eight hundred eighteen thousand, two hundred twelve".