18480791 has 12 divisors (see below), whose sum is σ = 22024800. Its totient is φ = 15452640.

The previous prime is 18480779. The next prime is 18480809. The reversal of 18480791 is 19708481.

It is not a de Polignac number, because 18480791 - 2⁶ = 18480727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18480191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2591 + ... + 6608.

It is an arithmetic number, because the mean of its divisors is an integer number (1835400).

Almost surely, 2^18480791 is an apocalyptic number.

18480791 is a deficient number, since it is larger than the sum of its proper divisors (3544009).

18480791 is an equidigital number, since it uses as much as digits as its factorization.

18480791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9254 (or 9247 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 18480791 is about 4298.9290526828. The cubic root of 18480791 is about 264.3870537382.

The spelling of 18480791 in words is "eighteen million, four hundred eighty thousand, seven hundred ninety-one".