18079417843919 has 4 divisors (see below), whose sum is σ = 18081251652120. Its totient is φ = 18077584035720.

The previous prime is 18079417843897. The next prime is 18079417843943. The reversal of 18079417843919 is 91934871497081.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18079417843919 is a prime.

It is a super-2 number, since 2×18079417843919² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18079417843519) 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, 916889312 + ... + 916909029.

It is an arithmetic number, because the mean of its divisors is an integer number (4520312913030).

Almost surely, 2^{18079417843919} is an apocalyptic number.

18079417843919 is a deficient number, since it is larger than the sum of its proper divisors (1833808201).

18079417843919 is an equidigital number, since it uses as much as digits as its factorization.

18079417843919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833808200.

The product of its (nonzero) digits is 109734912, while the sum is 71.

The spelling of 18079417843919 in words is "eighteen trillion, seventy-nine billion, four hundred seventeen million, eight hundred forty-three thousand, nine hundred nineteen".