18977876363 has 2 divisors, whose sum is σ = 18977876364. Its totient is φ = 18977876362.

The previous prime is 18977876321. The next prime is 18977876369. The reversal of 18977876363 is 36367877981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18977876363 - 2¹² = 18977872267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18977876363.

It is not a weakly prime, because it can be changed into another prime (18977876369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9488938181 + 9488938182.

It is an arithmetic number, because the mean of its divisors is an integer number (9488938182).

Almost surely, 2^18977876363 is an apocalyptic number.

18977876363 is a deficient number, since it is larger than the sum of its proper divisors (1).

18977876363 is an equidigital number, since it uses as much as digits as its factorization.

18977876363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64012032, while the sum is 65.

The spelling of 18977876363 in words is "eighteen billion, nine hundred seventy-seven million, eight hundred seventy-six thousand, three hundred sixty-three".