18178766472 has 64 divisors (see below), whose sum is σ = 46156492800. Its totient is φ = 5965427520.

The previous prime is 18178766471. The next prime is 18178766497. The reversal of 18178766472 is 27466787181.

It is a super-2 number, since 2×18178766472² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18178766471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644097 + ... + 671727.

It is an arithmetic number, because the mean of its divisors is an integer number (721195200).

Almost surely, 2^18178766472 is an apocalyptic number.

18178766472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18178766472 is an abundant number, since it is smaller than the sum of its proper divisors (27977726328).

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

18178766472 is a wasteful number, since it uses less digits than its factorization.

18178766472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28066 (or 28062 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 57.

The spelling of 18178766472 in words is "eighteen billion, one hundred seventy-eight million, seven hundred sixty-six thousand, four hundred seventy-two".