22294643 has 4 divisors (see below), whose sum is σ = 25479600. Its totient is φ = 19109688.

The previous prime is 22294603. The next prime is 22294661. The reversal of 22294643 is 34649222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34649222 = 2 ⋅17324611.

It is a cyclic number.

It is not a de Polignac number, because 22294643 - 2¹⁸ = 22032499 is a prime.

It is a super-2 number, since 2×22294643² = 994102212994898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22294603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1592468 + ... + 1592481.

It is an arithmetic number, because the mean of its divisors is an integer number (6369900).

Almost surely, 2^22294643 is an apocalyptic number.

22294643 is a deficient number, since it is larger than the sum of its proper divisors (3184957).

22294643 is an equidigital number, since it uses as much as digits as its factorization.

22294643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184956.

The product of its digits is 20736, while the sum is 32.

The square root of 22294643 is about 4721.7203432647. The cubic root of 22294643 is about 281.4493008440.

The spelling of 22294643 in words is "twenty-two million, two hundred ninety-four thousand, six hundred forty-three".