18739534669 has 2 divisors, whose sum is σ = 18739534670. Its totient is φ = 18739534668.

The previous prime is 18739534607. The next prime is 18739534703. The reversal of 18739534669 is 96643593781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14584185225 + 4155349444 = 120765^2 + 64462^2 .

It is a cyclic number.

It is not a de Polignac number, because 18739534669 - 2²⁷ = 18605316941 is a prime.

It is a super-2 number, since 2×18739534669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18739531669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9369767334 + 9369767335.

It is an arithmetic number, because the mean of its divisors is an integer number (9369767335).

Almost surely, 2^18739534669 is an apocalyptic number.

It is an amenable number.

18739534669 is a deficient number, since it is larger than the sum of its proper divisors (1).

18739534669 is an equidigital number, since it uses as much as digits as its factorization.

18739534669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29393280, while the sum is 61.

The spelling of 18739534669 in words is "eighteen billion, seven hundred thirty-nine million, five hundred thirty-four thousand, six hundred sixty-nine".