18999055272 has 32 divisors (see below), whose sum is σ = 48656119680. Its totient is φ = 6178554240.

The previous prime is 18999055249. The next prime is 18999055277. The reversal of 18999055272 is 27255099981.

It is not an unprimeable number, because it can be changed into a prime (18999055277) 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 7 ways as a sum of consecutive naturals, for example, 9653008 + ... + 9654975.

It is an arithmetic number, because the mean of its divisors is an integer number (1520503740).

Almost surely, 2^18999055272 is an apocalyptic number.

18999055272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18999055272 is an abundant number, since it is smaller than the sum of its proper divisors (29657064408).

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

18999055272 is a wasteful number, since it uses less digits than its factorization.

18999055272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19308033 (or 19308029 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 57.

The spelling of 18999055272 in words is "eighteen billion, nine hundred ninety-nine million, fifty-five thousand, two hundred seventy-two".