18817023746 has 16 divisors (see below), whose sum is σ = 29504855040. Its totient is φ = 8989755840.

The previous prime is 18817023727. The next prime is 18817023751. The reversal of 18817023746 is 64732071881.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18817023746.

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, 1915991 + ... + 1925786.

It is an arithmetic number, because the mean of its divisors is an integer number (1844053440).

Almost surely, 2^18817023746 is an apocalyptic number.

18817023746 is a deficient number, since it is larger than the sum of its proper divisors (10687831294).

18817023746 is a wasteful number, since it uses less digits than its factorization.

18817023746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841889.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 18817023746 in words is "eighteen billion, eight hundred seventeen million, twenty-three thousand, seven hundred forty-six".