22640507 has 4 divisors (see below), whose sum is σ = 22656096. Its totient is φ = 22624920.

The previous prime is 22640477. The next prime is 22640539. The reversal of 22640507 is 70504622.

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 22640507 - 2¹⁶ = 22574971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22640557) 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, 5363 + ... + 8604.

It is an arithmetic number, because the mean of its divisors is an integer number (5664024).

Almost surely, 2^22640507 is an apocalyptic number.

22640507 is a deficient number, since it is larger than the sum of its proper divisors (15589).

22640507 is a wasteful number, since it uses less digits than its factorization.

22640507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15588.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 22640507 is about 4758.2041780487. The cubic root of 22640507 is about 282.8972436356.

The spelling of 22640507 in words is "twenty-two million, six hundred forty thousand, five hundred seven".