22640693 has 4 divisors (see below), whose sum is σ = 22959648. Its totient is φ = 22321740.

The previous prime is 22640641. The next prime is 22640701. The reversal of 22640693 is 39604622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39604622 = 2 ⋅19802311.

It is a cyclic number.

It is not a de Polignac number, because 22640693 - 2⁸ = 22640437 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 (22640603) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 159371 + ... + 159512.

It is an arithmetic number, because the mean of its divisors is an integer number (5739912).

Almost surely, 2^22640693 is an apocalyptic number.

It is an amenable number.

22640693 is a deficient number, since it is larger than the sum of its proper divisors (318955).

22640693 is an equidigital number, since it uses as much as digits as its factorization.

22640693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318954.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 22640693 is about 4758.2237231976. The cubic root of 22640693 is about 282.8980183348.

The spelling of 22640693 in words is "twenty-two million, six hundred forty thousand, six hundred ninety-three".