22509639 has 6 divisors (see below), whose sum is σ = 32513936. Its totient is φ = 15006420.

The previous prime is 22509637. The next prime is 22509677. The reversal of 22509639 is 93690522.

It is not a de Polignac number, because 22509639 - 2¹ = 22509637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22509637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1250527 + ... + 1250544.

Almost surely, 2^22509639 is an apocalyptic number.

22509639 is a deficient number, since it is larger than the sum of its proper divisors (10004297).

22509639 is a wasteful number, since it uses less digits than its factorization.

22509639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501077 (or 2501074 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 22509639 is about 4744.4324212702. The cubic root of 22509639 is about 282.3511168923.

The spelling of 22509639 in words is "twenty-two million, five hundred nine thousand, six hundred thirty-nine".