22204538 has 4 divisors (see below), whose sum is σ = 33306810. Its totient is φ = 11102268.

The previous prime is 22204531. The next prime is 22204541. The reversal of 22204538 is 83540222.

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

It can be written as a sum of positive squares in only one way, i.e., 16216729 + 5987809 = 4027^2 + 2447^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22204531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551133 + ... + 5551136.

Almost surely, 2^22204538 is an apocalyptic number.

22204538 is a deficient number, since it is larger than the sum of its proper divisors (11102272).

22204538 is a wasteful number, since it uses less digits than its factorization.

22204538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11102271.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 22204538 is about 4712.1691395789. The cubic root of 22204538 is about 281.0696247225.

The spelling of 22204538 in words is "twenty-two million, two hundred four thousand, five hundred thirty-eight".