22640023 has 16 divisors (see below), whose sum is σ = 26417664. Its totient is φ = 19003680.

The previous prime is 22639987. The next prime is 22640053. The reversal of 22640023 is 32004622.

It is a cyclic number.

It is not a de Polignac number, because 22640023 - 2⁹ = 22639511 is a prime.

It is a super-3 number, since 3×22640023³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124993 + ... + 125173.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^22640023 is an apocalyptic number.

22640023 is a deficient number, since it is larger than the sum of its proper divisors (3777641).

22640023 is a wasteful number, since it uses less digits than its factorization.

22640023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 22640023 is about 4758.1533182528. The cubic root of 22640023 is about 282.8952277320.

Adding to 22640023 its reverse (32004622), we get a palindrome (54644645).

The spelling of 22640023 in words is "twenty-two million, six hundred forty thousand, twenty-three".