18447713 has 4 divisors (see below), whose sum is σ = 18723120. Its totient is φ = 18172308.

The previous prime is 18447691. The next prime is 18447721. The reversal of 18447713 is 31774481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31774481 = 109 ⋅291509.

It is a cyclic number.

It is not a de Polignac number, because 18447713 - 2¹² = 18443617 is a prime.

It is a super-2 number, since 2×18447713² = 680636229860738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18447773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137603 + ... + 137736.

It is an arithmetic number, because the mean of its divisors is an integer number (4680780).

Almost surely, 2^18447713 is an apocalyptic number.

It is an amenable number.

18447713 is a deficient number, since it is larger than the sum of its proper divisors (275407).

18447713 is an equidigital number, since it uses as much as digits as its factorization.

18447713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275406.

The product of its digits is 18816, while the sum is 35.

The square root of 18447713 is about 4295.0800923848. The cubic root of 18447713 is about 264.2292210670.

The spelling of 18447713 in words is "eighteen million, four hundred forty-seven thousand, seven hundred thirteen".