18214972679 has 2 divisors, whose sum is σ = 18214972680. Its totient is φ = 18214972678.

The previous prime is 18214972667. The next prime is 18214972693. The reversal of 18214972679 is 97627941281.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18214972679 - 2⁸ = 18214972423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18214972619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9107486339 + 9107486340.

It is an arithmetic number, because the mean of its divisors is an integer number (9107486340).

Almost surely, 2^18214972679 is an apocalyptic number.

18214972679 is a deficient number, since it is larger than the sum of its proper divisors (1).

18214972679 is an equidigital number, since it uses as much as digits as its factorization.

18214972679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 56.

The spelling of 18214972679 in words is "eighteen billion, two hundred fourteen million, nine hundred seventy-two thousand, six hundred seventy-nine".