18391614679 has 16 divisors (see below), whose sum is σ = 20010627936. Its totient is φ = 16832793600.

The previous prime is 18391614673. The next prime is 18391614701. The reversal of 18391614679 is 97641619381.

It is a cyclic number.

It is not a de Polignac number, because 18391614679 - 2³³ = 9801680087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18391614673) 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, 1333539 + ... + 1347259.

It is an arithmetic number, because the mean of its divisors is an integer number (1250664246).

Almost surely, 2^18391614679 is an apocalyptic number.

18391614679 is a deficient number, since it is larger than the sum of its proper divisors (1619013257).

18391614679 is a wasteful number, since it uses less digits than its factorization.

18391614679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15906.

The product of its digits is 1959552, while the sum is 55.

The spelling of 18391614679 in words is "eighteen billion, three hundred ninety-one million, six hundred fourteen thousand, six hundred seventy-nine".