18266941158 has 32 divisors (see below), whose sum is σ = 36840303360. Its totient is φ = 6038124000.

The previous prime is 18266941153. The next prime is 18266941163. The reversal of 18266941158 is 85114966281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18266941153) and next prime (18266941163).

It is a super-2 number, since 2×18266941158² (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 18266941158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18266941153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318391 + ... + 371357.

It is an arithmetic number, because the mean of its divisors is an integer number (1151259480).

Almost surely, 2^18266941158 is an apocalyptic number.

18266941158 is an abundant number, since it is smaller than the sum of its proper divisors (18573362202).

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

18266941158 is a wasteful number, since it uses less digits than its factorization.

18266941158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53452.

The product of its digits is 829440, while the sum is 51.

The spelling of 18266941158 in words is "eighteen billion, two hundred sixty-six million, nine hundred forty-one thousand, one hundred fifty-eight".