18266867522 has 6 divisors (see below), whose sum is σ = 27400587993. Its totient is φ = 9133338192.

The previous prime is 18266867519. The next prime is 18266867543. The reversal of 18266867522 is 22576866281.

It can be written as a sum of positive squares in 2 ways, for example, as 10217368561 + 8049498961 = 101081^2 + 89719^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=95569.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 143354 + ... + 238922.

Almost surely, 2^18266867522 is an apocalyptic number.

18266867522 is a deficient number, since it is larger than the sum of its proper divisors (9133720471).

18266867522 is an frugal number, since it uses more digits than its factorization.

18266867522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191140 (or 95571 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 53.

The spelling of 18266867522 in words is "eighteen billion, two hundred sixty-six million, eight hundred sixty-seven thousand, five hundred twenty-two".