18993064711 has 2 divisors, whose sum is σ = 18993064712. Its totient is φ = 18993064710.

The previous prime is 18993064703. The next prime is 18993064759. The reversal of 18993064711 is 11746039981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18993064711 - 2³ = 18993064703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18993004711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9496532355 + 9496532356.

It is an arithmetic number, because the mean of its divisors is an integer number (9496532356).

Almost surely, 2^18993064711 is an apocalyptic number.

18993064711 is a deficient number, since it is larger than the sum of its proper divisors (1).

18993064711 is an equidigital number, since it uses as much as digits as its factorization.

18993064711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 18993064711 in words is "eighteen billion, nine hundred ninety-three million, sixty-four thousand, seven hundred eleven".