18380408759 has 4 divisors (see below), whose sum is σ = 18419767704. Its totient is φ = 18341049816.

The previous prime is 18380408743. The next prime is 18380408791. The reversal of 18380408759 is 95780408381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95780408381 = 7 ⋅13682915483.

It is a cyclic number.

It is not a de Polignac number, because 18380408759 - 2⁴ = 18380408743 is a prime.

It is a super-2 number, since 2×18380408759² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18380408759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380408729) 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, 19678772 + ... + 19679705.

It is an arithmetic number, because the mean of its divisors is an integer number (4604941926).

Almost surely, 2^18380408759 is an apocalyptic number.

18380408759 is a deficient number, since it is larger than the sum of its proper divisors (39358945).

18380408759 is an equidigital number, since it uses as much as digits as its factorization.

18380408759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39358944.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 18380408759 in words is "eighteen billion, three hundred eighty million, four hundred eight thousand, seven hundred fifty-nine".