18701966860877 has 2 divisors, whose sum is σ = 18701966860878. Its totient is φ = 18701966860876.

The previous prime is 18701966860861. The next prime is 18701966861027. The reversal of 18701966860877 is 77806866910781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11481600179401 + 7220366681476 = 3388451^2 + 2687074^2 .

It is a cyclic number.

It is not a de Polignac number, because 18701966860877 - 2⁴ = 18701966860861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18701966860807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9350983430438 + 9350983430439.

It is an arithmetic number, because the mean of its divisors is an integer number (9350983430439).

Almost surely, 2^{18701966860877} is an apocalyptic number.

It is an amenable number.

18701966860877 is a deficient number, since it is larger than the sum of its proper divisors (1).

18701966860877 is an equidigital number, since it uses as much as digits as its factorization.

18701966860877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 341397504, while the sum is 74.

The spelling of 18701966860877 in words is "eighteen trillion, seven hundred one billion, nine hundred sixty-six million, eight hundred sixty thousand, eight hundred seventy-seven".