18273866913 has 12 divisors (see below), whose sum is σ = 26957194368. Its totient is φ = 11923373880.

The previous prime is 18273866881. The next prime is 18273866917. The reversal of 18273866913 is 31966837281.

It is not a de Polignac number, because 18273866913 - 2⁵ = 18273866881 is a prime.

It is a super-2 number, since 2×18273866913² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18273866913.

It is not an unprimeable number, because it can be changed into a prime (18273866917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21599893 + ... + 21600738.

It is an arithmetic number, because the mean of its divisors is an integer number (2246432864).

Almost surely, 2^18273866913 is an apocalyptic number.

It is an amenable number.

18273866913 is a deficient number, since it is larger than the sum of its proper divisors (8683327455).

18273866913 is a wasteful number, since it uses less digits than its factorization.

18273866913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43200684 (or 43200681 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 18273866913 in words is "eighteen billion, two hundred seventy-three million, eight hundred sixty-six thousand, nine hundred thirteen".