22744427 has 4 divisors (see below), whose sum is σ = 22825080. Its totient is φ = 22663776.

The previous prime is 22744411. The next prime is 22744429. The reversal of 22744427 is 72444722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22744427 - 2⁴ = 22744411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22744393 and 22744402.

It is not an unprimeable number, because it can be changed into a prime (22744429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39902 + ... + 40467.

It is an arithmetic number, because the mean of its divisors is an integer number (5706270).

Almost surely, 2^22744427 is an apocalyptic number.

22744427 is a deficient number, since it is larger than the sum of its proper divisors (80653).

22744427 is an equidigital number, since it uses as much as digits as its factorization.

22744427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80652.

The product of its digits is 25088, while the sum is 32.

The square root of 22744427 is about 4769.1117621628. Note that the first 3 decimals coincide. The cubic root of 22744427 is about 283.3294161704.

The spelling of 22744427 in words is "twenty-two million, seven hundred forty-four thousand, four hundred twenty-seven".