18426667508 has 12 divisors (see below), whose sum is σ = 32391273600. Its totient is φ = 9172017912.

The previous prime is 18426667507. The next prime is 18426667529. The reversal of 18426667508 is 80576662481.

It is a happy number.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18426667508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18426667507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10327958 + ... + 10329741.

It is an arithmetic number, because the mean of its divisors is an integer number (2699272800).

Almost surely, 2^18426667508 is an apocalyptic number.

It is an amenable number.

18426667508 is a deficient number, since it is larger than the sum of its proper divisors (13964606092).

18426667508 is a wasteful number, since it uses less digits than its factorization.

18426667508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20657926 (or 20657924 counting only the distinct ones).

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

The spelling of 18426667508 in words is "eighteen billion, four hundred twenty-six million, six hundred sixty-seven thousand, five hundred eight".