18942998208 has 56 divisors (see below), whose sum is σ = 50133180912. Its totient is φ = 6312674304.

The previous prime is 18942998171. The next prime is 18942998251. The reversal of 18942998208 is 80289924981.

It is a super-2 number, since 2×18942998208² (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, 879666 + ... + 900942.

Almost surely, 2^18942998208 is an apocalyptic number.

It is an amenable number.

18942998208 is an abundant number, since it is smaller than the sum of its proper divisors (31190182704).

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

18942998208 is a wasteful number, since it uses less digits than its factorization.

18942998208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25929 (or 25919 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 60.

The spelling of 18942998208 in words is "eighteen billion, nine hundred forty-two million, nine hundred ninety-eight thousand, two hundred eight".