22743905 has 4 divisors (see below), whose sum is σ = 27292692. Its totient is φ = 18195120.

The previous prime is 22743883. The next prime is 22743907. The reversal of 22743905 is 50934722.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50934722 = 2 ⋅25467361.

It can be written as a sum of positive squares in 2 ways, for example, as 17230801 + 5513104 = 4151^2 + 2348^2 .

It is not a de Polignac number, because 22743905 - 2⁸ = 22743649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22743907) 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, 2274386 + ... + 2274395.

It is an arithmetic number, because the mean of its divisors is an integer number (6823173).

Almost surely, 2^22743905 is an apocalyptic number.

It is an amenable number.

22743905 is a deficient number, since it is larger than the sum of its proper divisors (4548787).

22743905 is an equidigital number, since it uses as much as digits as its factorization.

22743905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4548786.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 22743905 is about 4769.0570346768. The cubic root of 22743905 is about 283.3272486198.

The spelling of 22743905 in words is "twenty-two million, seven hundred forty-three thousand, nine hundred five".