18738242759 has 2 divisors, whose sum is σ = 18738242760. Its totient is φ = 18738242758.

The previous prime is 18738242749. The next prime is 18738242797. The reversal of 18738242759 is 95724283781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18738242759 - 2²⁰ = 18737194183 is a prime.

It is a super-2 number, since 2×18738242759² (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 (18738242749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9369121379 + 9369121380.

It is an arithmetic number, because the mean of its divisors is an integer number (9369121380).

Almost surely, 2^18738242759 is an apocalyptic number.

18738242759 is a deficient number, since it is larger than the sum of its proper divisors (1).

18738242759 is an equidigital number, since it uses as much as digits as its factorization.

18738242759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 56.

The spelling of 18738242759 in words is "eighteen billion, seven hundred thirty-eight million, two hundred forty-two thousand, seven hundred fifty-nine".