18010979691 has 32 divisors (see below), whose sum is σ = 24568427520. Its totient is φ = 11734311936.

The previous prime is 18010979689. The next prime is 18010979717. The reversal of 18010979691 is 19697901081.

It is not a de Polignac number, because 18010979691 - 2¹ = 18010979689 is a prime.

It is a super-2 number, since 2×18010979691² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18010979191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12111550 + ... + 12113036.

It is an arithmetic number, because the mean of its divisors is an integer number (767763360).

Almost surely, 2^18010979691 is an apocalyptic number.

18010979691 is a deficient number, since it is larger than the sum of its proper divisors (6557447829).

18010979691 is a wasteful number, since it uses less digits than its factorization.

18010979691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083.

The product of its (nonzero) digits is 244944, while the sum is 51.

The spelling of 18010979691 in words is "eighteen billion, ten million, nine hundred seventy-nine thousand, six hundred ninety-one".