18207055266 has 16 divisors (see below), whose sum is σ = 36875049600. Its totient is φ = 5992195248.

The previous prime is 18207055259. The next prime is 18207055309. The reversal of 18207055266 is 66255070281.

It is a super-2 number, since 2×18207055266² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19205281 + ... + 19206228.

It is an arithmetic number, because the mean of its divisors is an integer number (2304690600).

Almost surely, 2^18207055266 is an apocalyptic number.

18207055266 is an abundant number, since it is smaller than the sum of its proper divisors (18667994334).

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

18207055266 is a wasteful number, since it uses less digits than its factorization.

18207055266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38411593.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 18207055266 in words is "eighteen billion, two hundred seven million, fifty-five thousand, two hundred sixty-six".