18185428992 has 56 divisors (see below), whose sum is σ = 48491582976. Its totient is φ = 6061801472.

The previous prime is 18185428973. The next prime is 18185429077. The reversal of 18185428992 is 29982458181.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345408 + ... + 394559.

Almost surely, 2^18185428992 is an apocalyptic number.

18185428992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18185428992 is an abundant number, since it is smaller than the sum of its proper divisors (30306153984).

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

18185428992 is an frugal number, since it uses more digits than its factorization.

18185428992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739996 (or 739972 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 57.

The spelling of 18185428992 in words is "eighteen billion, one hundred eighty-five million, four hundred twenty-eight thousand, nine hundred ninety-two".