22189643 has 4 divisors (see below), whose sum is σ = 25359600. Its totient is φ = 19019688.

The previous prime is 22189633. The next prime is 22189649. The reversal of 22189643 is 34698122.

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 22189643 - 2⁶ = 22189579 is a prime.

It is a super-3 number, since 3×22189643³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22189649) 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, 1584968 + ... + 1584981.

It is an arithmetic number, because the mean of its divisors is an integer number (6339900).

Almost surely, 2^22189643 is an apocalyptic number.

22189643 is a deficient number, since it is larger than the sum of its proper divisors (3169957).

22189643 is an equidigital number, since it uses as much as digits as its factorization.

22189643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169956.

The product of its digits is 20736, while the sum is 35.

The square root of 22189643 is about 4710.5883921226. The cubic root of 22189643 is about 281.0067626695.

The spelling of 22189643 in words is "twenty-two million, one hundred eighty-nine thousand, six hundred forty-three".