18336119439457 has 4 divisors (see below), whose sum is σ = 18831690235156. Its totient is φ = 17840548643760.

The previous prime is 18336119439437. The next prime is 18336119439487. The reversal of 18336119439457 is 75493491163381.

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 11475826984801 + 6860292454656 = 3387599^2 + 2619216^2 .

It is a cyclic number.

It is not a de Polignac number, because 18336119439457 - 2³⁵ = 18301759701089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18336119439427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247785397794 + ... + 247785397867.

It is an arithmetic number, because the mean of its divisors is an integer number (4707922558789).

Almost surely, 2^{18336119439457} is an apocalyptic number.

It is an amenable number.

18336119439457 is a deficient number, since it is larger than the sum of its proper divisors (495570795699).

18336119439457 is an equidigital number, since it uses as much as digits as its factorization.

18336119439457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495570795698.

The product of its digits is 58786560, while the sum is 64.

The spelling of 18336119439457 in words is "eighteen trillion, three hundred thirty-six billion, one hundred nineteen million, four hundred thirty-nine thousand, four hundred fifty-seven".