22641643 has 4 divisors (see below), whose sum is σ = 22875160. Its totient is φ = 22408128.

The previous prime is 22641629. The next prime is 22641677. The reversal of 22641643 is 34614622.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22641643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22641343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116613 + ... + 116806.

It is an arithmetic number, because the mean of its divisors is an integer number (5718790).

Almost surely, 2^22641643 is an apocalyptic number.

22641643 is a deficient number, since it is larger than the sum of its proper divisors (233517).

22641643 is an equidigital number, since it uses as much as digits as its factorization.

22641643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233516.

The product of its digits is 6912, while the sum is 28.

The square root of 22641643 is about 4758.3235493186. The cubic root of 22641643 is about 282.9019750652.

The spelling of 22641643 in words is "twenty-two million, six hundred forty-one thousand, six hundred forty-three".