18774748739 has 2 divisors, whose sum is σ = 18774748740. Its totient is φ = 18774748738.

The previous prime is 18774748703. The next prime is 18774748757. The reversal of 18774748739 is 93784747781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18774748739 - 2²⁸ = 18506313283 is a prime.

It is not a weakly prime, because it can be changed into another prime (18714748739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9387374369 + 9387374370.

It is an arithmetic number, because the mean of its divisors is an integer number (9387374370).

Almost surely, 2^18774748739 is an apocalyptic number.

18774748739 is a deficient number, since it is larger than the sum of its proper divisors (1).

18774748739 is an equidigital number, since it uses as much as digits as its factorization.

18774748739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66382848, while the sum is 65.

The spelling of 18774748739 in words is "eighteen billion, seven hundred seventy-four million, seven hundred forty-eight thousand, seven hundred thirty-nine".