18281872818232 has 8 divisors (see below), whose sum is σ = 34278511534200. Its totient is φ = 9140936409112.

The previous prime is 18281872818211. The next prime is 18281872818311. The reversal of 18281872818232 is 23281827818281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×18281872818232² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1142617051132 + ... + 1142617051147.

It is an arithmetic number, because the mean of its divisors is an integer number (4284813941775).

Almost surely, 2^{18281872818232} is an apocalyptic number.

It is an amenable number.

18281872818232 is a deficient number, since it is larger than the sum of its proper divisors (15996638715968).

18281872818232 is a wasteful number, since it uses less digits than its factorization.

18281872818232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285234102285 (or 2285234102281 counting only the distinct ones).

The product of its digits is 11010048, while the sum is 61.

The spelling of 18281872818232 in words is "eighteen trillion, two hundred eighty-one billion, eight hundred seventy-two million, eight hundred eighteen thousand, two hundred thirty-two".