18618426868 has 24 divisors (see below), whose sum is σ = 33014600640. Its totient is φ = 9185954880.

The previous prime is 18618426847. The next prime is 18618426901. The reversal of 18618426868 is 86862481681.

It is a happy number.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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, 245128 + ... + 311968.

It is an arithmetic number, because the mean of its divisors is an integer number (1375608360).

Almost surely, 2^18618426868 is an apocalyptic number.

It is an amenable number.

18618426868 is a deficient number, since it is larger than the sum of its proper divisors (14396173772).

18618426868 is a wasteful number, since it uses less digits than its factorization.

18618426868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67767 (or 67765 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 58.

The spelling of 18618426868 in words is "eighteen billion, six hundred eighteen million, four hundred twenty-six thousand, eight hundred sixty-eight".