18771058992 has 80 divisors (see below), whose sum is σ = 57207068672. Its totient is φ = 5190151680.

The previous prime is 18771058991. The next prime is 18771059009. The reversal of 18771058992 is 29985017781.

It is a super-2 number, since 2×18771058992² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18771058991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 890653 + ... + 911484.

Almost surely, 2^18771058992 is an apocalyptic number.

18771058992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18771058992 is an abundant number, since it is smaller than the sum of its proper divisors (38436009680).

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

18771058992 is a wasteful number, since it uses less digits than its factorization.

18771058992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802186 (or 1802180 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 57.

The spelling of 18771058992 in words is "eighteen billion, seven hundred seventy-one million, fifty-eight thousand, nine hundred ninety-two".