22747 has 6 divisors (see below), whose sum is σ = 24332. Its totient is φ = 21252.

The previous prime is 22741. The next prime is 22751. The reversal of 22747 is 74722.

It is not a de Polignac number, because 22747 - 2³ = 22739 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (22741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508 + ... + 550.

2²²⁷⁴⁷ is an apocalyptic number.

22747 is a deficient number, since it is larger than the sum of its proper divisors (1585).

22747 is an equidigital number, since it uses as much as digits as its factorization.

22747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 66 counting only the distinct ones).

The product of its digits is 784, while the sum is 22.

The square root of 22747 is about 150.8210860589. The cubic root of 22747 is about 28.3340099800.

The spelling of 22747 in words is "twenty-two thousand, seven hundred forty-seven", and thus it is an iban number.