18995722566672 has 40 divisors (see below), whose sum is σ = 49073206710976. Its totient is φ = 6331788372096.

The previous prime is 18995722566643. The next prime is 18995722566679. The reversal of 18995722566672 is 27666522759981.

It is a junction number, because it is equal to n+sod(n) for n = 18995722566594 and 18995722566603.

It is not an unprimeable number, because it can be changed into a prime (18995722566679) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1127383 + ... + 6265974.

Almost surely, 2^{18995722566672} is an apocalyptic number.

18995722566672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18995722566672 is an abundant number, since it is smaller than the sum of its proper divisors (30077484144304).

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

18995722566672 is a wasteful number, since it uses less digits than its factorization.

18995722566672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7446895 (or 7446889 counting only the distinct ones).

The product of its digits is 1371686400, while the sum is 75.

The spelling of 18995722566672 in words is "eighteen trillion, nine hundred ninety-five billion, seven hundred twenty-two million, five hundred sixty-six thousand, six hundred seventy-two".