18990792000 has 168 divisors, whose sum is σ = 67933485672. Its totient is φ = 5064192000.

The previous prime is 18990791993. The next prime is 18990792001. The reversal of 18990792000 is 29709981.

It can be written as a sum of positive squares in 4 ways, for example, as 596922624 + 18393869376 = 24432^2 + 135624^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18990792001) 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 23 ways as a sum of consecutive naturals, for example, 59881 + ... + 203880.

Almost surely, 2^18990792000 is an apocalyptic number.

18990792000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18990792000 is an abundant number, since it is smaller than the sum of its proper divisors (48942693672).

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

18990792000 is a wasteful number, since it uses less digits than its factorization.

18990792000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263794 (or 263771 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The spelling of 18990792000 in words is "eighteen billion, nine hundred ninety million, seven hundred ninety-two thousand".