18979200679 has 2 divisors, whose sum is σ = 18979200680. Its totient is φ = 18979200678.

The previous prime is 18979200641. The next prime is 18979200683. The reversal of 18979200679 is 97600297981.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18979200679 - 2¹⁹ = 18978676391 is a prime.

It is a super-2 number, since 2×18979200679² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18979200619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9489600339 + 9489600340.

It is an arithmetic number, because the mean of its divisors is an integer number (9489600340).

Almost surely, 2^18979200679 is an apocalyptic number.

18979200679 is a deficient number, since it is larger than the sum of its proper divisors (1).

18979200679 is an equidigital number, since it uses as much as digits as its factorization.

18979200679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The spelling of 18979200679 in words is "eighteen billion, nine hundred seventy-nine million, two hundred thousand, six hundred seventy-nine".