18345885698 has 32 divisors (see below), whose sum is σ = 31708416000. Its totient is φ = 7798142160.

The previous prime is 18345885697. The next prime is 18345885709. The reversal of 18345885698 is 89658854381.

It is not an unprimeable number, because it can be changed into a prime (18345885697) 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, 1130663 + ... + 1146773.

It is an arithmetic number, because the mean of its divisors is an integer number (990888000).

Almost surely, 2^18345885698 is an apocalyptic number.

18345885698 is a deficient number, since it is larger than the sum of its proper divisors (13362530302).

18345885698 is a wasteful number, since it uses less digits than its factorization.

18345885698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16782.

The product of its digits is 66355200, while the sum is 65.

The spelling of 18345885698 in words is "eighteen billion, three hundred forty-five million, eight hundred eighty-five thousand, six hundred ninety-eight".