18272240291394 has 40 divisors (see below), whose sum is σ = 42264106587648. Its totient is φ = 5894271060120.

The previous prime is 18272240291339. The next prime is 18272240291411. The reversal of 18272240291394 is 49319204227281.

18272240291394 is a `hidden beast` number, since 1 + 8 + 2 + 7 + 2 + 240 + 2 + 9 + 1 + 394 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 18272240291394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1819214442 + ... + 1819224485.

Almost surely, 2^{18272240291394} is an apocalyptic number.

18272240291394 is an abundant number, since it is smaller than the sum of its proper divisors (23991866296254).

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

18272240291394 is a wasteful number, since it uses less digits than its factorization.

18272240291394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638438972 (or 3638438963 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 18272240291394 in words is "eighteen trillion, two hundred seventy-two billion, two hundred forty million, two hundred ninety-one thousand, three hundred ninety-four".