18677270893 has 2 divisors, whose sum is σ = 18677270894. Its totient is φ = 18677270892.

The previous prime is 18677270869. The next prime is 18677270923. The reversal of 18677270893 is 39807277681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18669943044 + 7327849 = 136638^2 + 2707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18677270893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18677370893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9338635446 + 9338635447.

It is an arithmetic number, because the mean of its divisors is an integer number (9338635447).

Almost surely, 2^18677270893 is an apocalyptic number.

It is an amenable number.

18677270893 is a deficient number, since it is larger than the sum of its proper divisors (1).

18677270893 is an equidigital number, since it uses as much as digits as its factorization.

18677270893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7112448, while the sum is 58.

The spelling of 18677270893 in words is "eighteen billion, six hundred seventy-seven million, two hundred seventy thousand, eight hundred ninety-three".