18391614677 has 4 divisors (see below), whose sum is σ = 18613200480. Its totient is φ = 18170028876.

The previous prime is 18391614673. The next prime is 18391614701. The reversal of 18391614677 is 77641619381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18391614677 - 2² = 18391614673 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 3 ways as a sum of consecutive naturals, for example, 110792777 + ... + 110792942.

It is an arithmetic number, because the mean of its divisors is an integer number (4653300120).

Almost surely, 2^18391614677 is an apocalyptic number.

It is an amenable number.

18391614677 is a deficient number, since it is larger than the sum of its proper divisors (221585803).

18391614677 is an equidigital number, since it uses as much as digits as its factorization.

18391614677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221585802.

The product of its digits is 1524096, while the sum is 53.

The spelling of 18391614677 in words is "eighteen billion, three hundred ninety-one million, six hundred fourteen thousand, six hundred seventy-seven".