18494696959 has 4 divisors (see below), whose sum is σ = 19132445160. Its totient is φ = 17856948760.

The previous prime is 18494696947. The next prime is 18494696981. The reversal of 18494696959 is 95969649481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18494696959 - 2²⁵ = 18461142527 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 (18494696989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318874057 + ... + 318874114.

It is an arithmetic number, because the mean of its divisors is an integer number (4783111290).

Almost surely, 2^18494696959 is an apocalyptic number.

18494696959 is a deficient number, since it is larger than the sum of its proper divisors (637748201).

18494696959 is an equidigital number, since it uses as much as digits as its factorization.

18494696959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637748200.

The product of its digits is 151165440, while the sum is 70.

The spelling of 18494696959 in words is "eighteen billion, four hundred ninety-four million, six hundred ninety-six thousand, nine hundred fifty-nine".