22140464 has 20 divisors (see below), whose sum is σ = 43021056. Its totient is φ = 11038272.

The previous prime is 22140449. The next prime is 22140493. The reversal of 22140464 is 46404122.

It is a super-2 number, since 2×22140464² = 980400292270592, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4322 + ... + 7934.

Almost surely, 2^22140464 is an apocalyptic number.

It is an amenable number.

22140464 is a deficient number, since it is larger than the sum of its proper divisors (20880592).

22140464 is a wasteful number, since it uses less digits than its factorization.

22140464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004 (or 3998 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 22140464 is about 4705.3654480816. The cubic root of 22140464 is about 280.7990102859.

Adding to 22140464 its reverse (46404122), we get a palindrome (68544586).

The spelling of 22140464 in words is "twenty-two million, one hundred forty thousand, four hundred sixty-four".