18742385418593 has 4 divisors (see below), whose sum is σ = 19199516770308. Its totient is φ = 18285254066880.

The previous prime is 18742385418571. The next prime is 18742385418619. The reversal of 18742385418593 is 39581458324781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7830779512609 + 10911605905984 = 2798353^2 + 3303272^2 .

It is a cyclic number.

It is not a de Polignac number, because 18742385418593 - 2²⁸ = 18742116983137 is a prime.

It is a super-2 number, since 2×18742385418593² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18742385418193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228565675796 + ... + 228565675877.

It is an arithmetic number, because the mean of its divisors is an integer number (4799879192577).

Almost surely, 2^{18742385418593} is an apocalyptic number.

It is an amenable number.

18742385418593 is a deficient number, since it is larger than the sum of its proper divisors (457131351715).

18742385418593 is an equidigital number, since it uses as much as digits as its factorization.

18742385418593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457131351714.

The product of its digits is 232243200, while the sum is 68.

The spelling of 18742385418593 in words is "eighteen trillion, seven hundred forty-two billion, three hundred eighty-five million, four hundred eighteen thousand, five hundred ninety-three".