22204639 has 2 divisors, whose sum is σ = 22204640. Its totient is φ = 22204638.

The previous prime is 22204621. The next prime is 22204661. The reversal of 22204639 is 93640222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22204639 - 2¹⁵ = 22171871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22204139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11102319 + 11102320.

It is an arithmetic number, because the mean of its divisors is an integer number (11102320).

Almost surely, 2^22204639 is an apocalyptic number.

22204639 is a deficient number, since it is larger than the sum of its proper divisors (1).

22204639 is an equidigital number, since it uses as much as digits as its factorization.

22204639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 22204639 is about 4712.1798564995. The cubic root of 22204639 is about 281.0700508814.

It can be divided in two parts, 2220 and 4639, that added together give a cube (6859 = 19³).

The spelling of 22204639 in words is "twenty-two million, two hundred four thousand, six hundred thirty-nine".