18972272092 has 12 divisors (see below), whose sum is σ = 33220915560. Its totient is φ = 9480581936.

The previous prime is 18972272083. The next prime is 18972272129. The reversal of 18972272092 is 29027227981.

It is a congruent number.

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, 1380838 + ... + 1394509.

It is an arithmetic number, because the mean of its divisors is an integer number (2768409630).

Almost surely, 2^18972272092 is an apocalyptic number.

It is an amenable number.

18972272092 is a deficient number, since it is larger than the sum of its proper divisors (14248643468).

18972272092 is a wasteful number, since it uses less digits than its factorization.

18972272092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777060 (or 2777058 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 18972272092 in words is "eighteen billion, nine hundred seventy-two million, two hundred seventy-two thousand, ninety-two".