18701966861027 has 2 divisors, whose sum is σ = 18701966861028. Its totient is φ = 18701966861026.

The previous prime is 18701966860877. The next prime is 18701966861131. The reversal of 18701966861027 is 72016866910781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18701966861027 is a prime.

It is not a weakly prime, because it can be changed into another prime (18701966881027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9350983430513 + 9350983430514.

It is an arithmetic number, because the mean of its divisors is an integer number (9350983430514).

Almost surely, 2^{18701966861027} is an apocalyptic number.

18701966861027 is a deficient number, since it is larger than the sum of its proper divisors (1).

18701966861027 is an equidigital number, since it uses as much as digits as its factorization.

18701966861027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 62.

The spelling of 18701966861027 in words is "eighteen trillion, seven hundred one billion, nine hundred sixty-six million, eight hundred sixty-one thousand, twenty-seven".