22642643 has 4 divisors (see below), whose sum is σ = 22696848. Its totient is φ = 22588440.

The previous prime is 22642637. The next prime is 22642667. The reversal of 22642643 is 34624622.

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 22642643 - 2¹⁴ = 22626259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22642343) 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, 26471 + ... + 27312.

It is an arithmetic number, because the mean of its divisors is an integer number (5674212).

Almost surely, 2^22642643 is an apocalyptic number.

22642643 is a deficient number, since it is larger than the sum of its proper divisors (54205).

22642643 is an equidigital number, since it uses as much as digits as its factorization.

22642643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54204.

The product of its digits is 13824, while the sum is 29.

The square root of 22642643 is about 4758.4286271836. The cubic root of 22642643 is about 282.9061399251.

The spelling of 22642643 in words is "twenty-two million, six hundred forty-two thousand, six hundred forty-three".