18000012699 has 40 divisors (see below), whose sum is σ = 27414486000. Its totient is φ = 11766498048.

The previous prime is 18000012689. The next prime is 18000012703. The reversal of 18000012699 is 99621000081.

It is not a de Polignac number, because 18000012699 - 2²⁷ = 17865794971 is a prime.

It is a super-2 number, since 2×18000012699² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18000012689) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1950007 + ... + 1959215.

It is an arithmetic number, because the mean of its divisors is an integer number (685362150).

Almost surely, 2^18000012699 is an apocalyptic number.

18000012699 is a deficient number, since it is larger than the sum of its proper divisors (9414473301).

18000012699 is an equidigital number, since it uses as much as digits as its factorization.

18000012699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9689 (or 9680 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 18000012699 in words is "eighteen billion, twelve thousand, six hundred ninety-nine".