18845161992 has 48 divisors (see below), whose sum is σ = 51738158940. Its totient is φ = 6195667968.

The previous prime is 18845161969. The next prime is 18845162029. The reversal of 18845161992 is 29916154881.

18845161992 is a `hidden beast` number, since 18 + 8 + 4 + 5 + 1 + 619 + 9 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18811219716 + 33942276 = 137154^2 + 5826^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1787473 + ... + 1797984.

Almost surely, 2^18845161992 is an apocalyptic number.

18845161992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18845161992 is an abundant number, since it is smaller than the sum of its proper divisors (32892996948).

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

18845161992 is a wasteful number, since it uses less digits than its factorization.

18845161992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585542 (or 3585535 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The spelling of 18845161992 in words is "eighteen billion, eight hundred forty-five million, one hundred sixty-one thousand, nine hundred ninety-two".