18407517859 has 2 divisors, whose sum is σ = 18407517860. Its totient is φ = 18407517858.

The previous prime is 18407517773. The next prime is 18407517881. The reversal of 18407517859 is 95871570481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18407517859 - 2¹⁹ = 18406993571 is a prime.

It is not a weakly prime, because it can be changed into another prime (18407517059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9203758929 + 9203758930.

It is an arithmetic number, because the mean of its divisors is an integer number (9203758930).

Almost surely, 2^18407517859 is an apocalyptic number.

18407517859 is a deficient number, since it is larger than the sum of its proper divisors (1).

18407517859 is an equidigital number, since it uses as much as digits as its factorization.

18407517859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2822400, while the sum is 55.

The spelling of 18407517859 in words is "eighteen billion, four hundred seven million, five hundred seventeen thousand, eight hundred fifty-nine".