22140504 has 48 divisors (see below), whose sum is σ = 61591920. Its totient is φ = 7179840.

The previous prime is 22140493. The next prime is 22140509. The reversal of 22140504 is 40504122.

22140504 is a `hidden beast` number, since 22 + 140 + 504 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22140509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1492 + ... + 6819.

It is an arithmetic number, because the mean of its divisors is an integer number (1283165).

Almost surely, 2^22140504 is an apocalyptic number.

22140504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22140504 is an abundant number, since it is smaller than the sum of its proper divisors (39451416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22140504 is a wasteful number, since it uses less digits than its factorization.

22140504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8360 (or 8353 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22140504 is about 4705.3696985465. The cubic root of 22140504 is about 280.7991793874.

Adding to 22140504 its reverse (40504122), we get a palindrome (62644626).

The spelling of 22140504 in words is "twenty-two million, one hundred forty thousand, five hundred four".