18239713 has 12 divisors (see below), whose sum is σ = 19500480. Its totient is φ = 17027912.

The previous prime is 18239701. The next prime is 18239717. The reversal of 18239713 is 31793281.

It is not a de Polignac number, because 18239713 - 2¹⁷ = 18108641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18239717) 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, 50628 + ... + 50986.

It is an arithmetic number, because the mean of its divisors is an integer number (1625040).

Almost surely, 2^18239713 is an apocalyptic number.

It is an amenable number.

18239713 is a deficient number, since it is larger than the sum of its proper divisors (1260767).

18239713 is an equidigital number, since it uses as much as digits as its factorization.

18239713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 429 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 18239713 is about 4270.7977006644. The cubic root of 18239713 is about 263.2323939721.

The spelling of 18239713 in words is "eighteen million, two hundred thirty-nine thousand, seven hundred thirteen".