18903076899913 has 2 divisors, whose sum is σ = 18903076899914. Its totient is φ = 18903076899912.

The previous prime is 18903076899853. The next prime is 18903076899929. The reversal of 18903076899913 is 31999867030981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18324666455824 + 578410444089 = 4280732^2 + 760533^2 .

It is an emirp because it is prime and its reverse (31999867030981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18903076899913 - 2⁴¹ = 16704053644361 is a prime.

It is not a weakly prime, because it can be changed into another prime (18903076899943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9451538449956 + 9451538449957.

It is an arithmetic number, because the mean of its divisors is an integer number (9451538449957).

Almost surely, 2^{18903076899913} is an apocalyptic number.

It is an amenable number.

18903076899913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18903076899913 is an equidigital number, since it uses as much as digits as its factorization.

18903076899913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158723712, while the sum is 73.

The spelling of 18903076899913 in words is "eighteen trillion, nine hundred three billion, seventy-six million, eight hundred ninety-nine thousand, nine hundred thirteen".