18807477019 has 2 divisors, whose sum is σ = 18807477020. Its totient is φ = 18807477018.

The previous prime is 18807477001. The next prime is 18807477061. The reversal of 18807477019 is 91077470881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18807477019 - 2³³ = 10217542427 is a prime.

It is a super-2 number, since 2×18807477019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18807477719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9403738509 + 9403738510.

It is an arithmetic number, because the mean of its divisors is an integer number (9403738510).

Almost surely, 2^18807477019 is an apocalyptic number.

18807477019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18807477019 is an equidigital number, since it uses as much as digits as its factorization.

18807477019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 52.

The spelling of 18807477019 in words is "eighteen billion, eight hundred seven million, four hundred seventy-seven thousand, nineteen".