22418540 has 24 divisors (see below), whose sum is σ = 47401200. Its totient is φ = 8906048.

The previous prime is 22418527. The next prime is 22418579. The reversal of 22418540 is 4581422.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 782 + ... + 6741.

It is an arithmetic number, because the mean of its divisors is an integer number (1975050).

Almost surely, 2^22418540 is an apocalyptic number.

22418540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22418540 is an abundant number, since it is smaller than the sum of its proper divisors (24982660).

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

22418540 is a wasteful number, since it uses less digits than its factorization.

22418540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7681 (or 7679 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 22418540 is about 4734.8220663505. The cubic root of 22418540 is about 281.9696998110.

Adding to 22418540 its reverse (4581422), we get a palindrome (26999962).

The spelling of 22418540 in words is "twenty-two million, four hundred eighteen thousand, five hundred forty".