18930636899 has 2 divisors, whose sum is σ = 18930636900. Its totient is φ = 18930636898.

The previous prime is 18930636863. The next prime is 18930636911. The reversal of 18930636899 is 99863603981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18930636899 is a prime.

It is not a weakly prime, because it can be changed into another prime (18930636859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9465318449 + 9465318450.

It is an arithmetic number, because the mean of its divisors is an integer number (9465318450).

Almost surely, 2^18930636899 is an apocalyptic number.

18930636899 is a deficient number, since it is larger than the sum of its proper divisors (1).

18930636899 is an equidigital number, since it uses as much as digits as its factorization.

18930636899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The spelling of 18930636899 in words is "eighteen billion, nine hundred thirty million, six hundred thirty-six thousand, eight hundred ninety-nine".