18715877320363 has 2 divisors, whose sum is σ = 18715877320364. Its totient is φ = 18715877320362.

The previous prime is 18715877320177. The next prime is 18715877320369. The reversal of 18715877320363 is 36302377851781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18715877320363 is a prime.

It is not a weakly prime, because it can be changed into another prime (18715877320369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9357938660181 + 9357938660182.

It is an arithmetic number, because the mean of its divisors is an integer number (9357938660182).

Almost surely, 2^{18715877320363} is an apocalyptic number.

18715877320363 is a deficient number, since it is larger than the sum of its proper divisors (1).

18715877320363 is an equidigital number, since it uses as much as digits as its factorization.

18715877320363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35562240, while the sum is 61.

The spelling of 18715877320363 in words is "eighteen trillion, seven hundred fifteen billion, eight hundred seventy-seven million, three hundred twenty thousand, three hundred sixty-three".