18038775311 has 2 divisors, whose sum is σ = 18038775312. Its totient is φ = 18038775310.

The previous prime is 18038775283. The next prime is 18038775319. The reversal of 18038775311 is 11357783081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18038775311 - 2¹⁸ = 18038513167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18038775319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9019387655 + 9019387656.

It is an arithmetic number, because the mean of its divisors is an integer number (9019387656).

Almost surely, 2^18038775311 is an apocalyptic number.

18038775311 is a deficient number, since it is larger than the sum of its proper divisors (1).

18038775311 is an equidigital number, since it uses as much as digits as its factorization.

18038775311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 18038775311 in words is "eighteen billion, thirty-eight million, seven hundred seventy-five thousand, three hundred eleven".