18023456217672 has 24 divisors (see below), whose sum is σ = 48813527256390. Its totient is φ = 6007818739200.

The previous prime is 18023456217649. The next prime is 18023456217707. The reversal of 18023456217672 is 27671265432081.

18023456217672 is a `hidden beast` number, since 1 + 8 + 0 + 2 + 3 + 4 + 5 + 621 + 7 + 6 + 7 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14819835919716 + 3203620297956 = 3849654^2 + 1789866^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125162890329 + ... + 125162890472.

Almost surely, 2^{18023456217672} is an apocalyptic number.

18023456217672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18023456217672 is an abundant number, since it is smaller than the sum of its proper divisors (30790071038718).

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

18023456217672 is a wasteful number, since it uses less digits than its factorization.

18023456217672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250325780813 (or 250325780806 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 18023456217672 in words is "eighteen trillion, twenty-three billion, four hundred fifty-six million, two hundred seventeen thousand, six hundred seventy-two".