18080635 has 4 divisors (see below), whose sum is σ = 21696768. Its totient is φ = 14464504.

The previous prime is 18080627. The next prime is 18080641. The reversal of 18080635 is 53608081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53608081 = 61 ⋅878821.

It is a cyclic number.

It is not a de Polignac number, because 18080635 - 2³ = 18080627 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18080597 and 18080606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1808059 + ... + 1808068.

It is an arithmetic number, because the mean of its divisors is an integer number (5424192).

Almost surely, 2^18080635 is an apocalyptic number.

18080635 is a deficient number, since it is larger than the sum of its proper divisors (3616133).

18080635 is an equidigital number, since it uses as much as digits as its factorization.

18080635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616132.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18080635 is about 4252.1329941572. The cubic root of 18080635 is about 262.4648962885.

The spelling of 18080635 in words is "eighteen million, eighty thousand, six hundred thirty-five".