18000012698 has 32 divisors (see below), whose sum is σ = 27659439360. Its totient is φ = 8783424000.

The previous prime is 18000012689. The next prime is 18000012703. The reversal of 18000012698 is 89621000081.

It is a super-2 number, since 2×18000012698² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5431490 + ... + 5434802.

It is an arithmetic number, because the mean of its divisors is an integer number (864357480).

Almost surely, 2^18000012698 is an apocalyptic number.

18000012698 is a deficient number, since it is larger than the sum of its proper divisors (9659426662).

18000012698 is a wasteful number, since it uses less digits than its factorization.

18000012698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 18000012698 in words is "eighteen billion, twelve thousand, six hundred ninety-eight".