22505642 has 4 divisors (see below), whose sum is σ = 33758466. Its totient is φ = 11252820.

The previous prime is 22505627. The next prime is 22505663. The reversal of 22505642 is 24650522.

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., 22477081 + 28561 = 4741^2 + 169^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5626409 + ... + 5626412.

Almost surely, 2^22505642 is an apocalyptic number.

22505642 is a deficient number, since it is larger than the sum of its proper divisors (11252824).

22505642 is a wasteful number, since it uses less digits than its factorization.

22505642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252823.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 22505642 is about 4744.0111719936. The cubic root of 22505642 is about 282.3344036934.

The spelling of 22505642 in words is "twenty-two million, five hundred five thousand, six hundred forty-two".