18293938272 has 72 divisors (see below), whose sum is σ = 55083600936. Its totient is φ = 5739273216.

The previous prime is 18293938261. The next prime is 18293938277. The reversal of 18293938272 is 27283939281.

18293938272 is a `hidden beast` number, since 182 + 9 + 393 + 8 + 2 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18293938277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1863358 + ... + 1873149.

It is an arithmetic number, because the mean of its divisors is an integer number (765050013).

Almost surely, 2^18293938272 is an apocalyptic number.

18293938272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18293938272 is an abundant number, since it is smaller than the sum of its proper divisors (36789662664).

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

18293938272 is a wasteful number, since it uses less digits than its factorization.

18293938272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736540 (or 3736529 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 18293938272 in words is "eighteen billion, two hundred ninety-three million, nine hundred thirty-eight thousand, two hundred seventy-two".