22618140 has 24 divisors (see below), whose sum is σ = 63330960. Its totient is φ = 6031488.

The previous prime is 22618117. The next prime is 22618147. The reversal of 22618140 is 4181622.

It is a self number, because there is not a number n which added to its sum of digits gives 22618140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22618147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188425 + ... + 188544.

It is an arithmetic number, because the mean of its divisors is an integer number (2638790).

Almost surely, 2^22618140 is an apocalyptic number.

22618140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22618140 is an abundant number, since it is smaller than the sum of its proper divisors (40712820).

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

22618140 is a wasteful number, since it uses less digits than its factorization.

22618140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376981 (or 376979 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 22618140 is about 4755.8532357507. The cubic root of 22618140 is about 282.8040530326.

Adding to 22618140 its reverse (4181622), we get a palindrome (26799762).

It can be divided in two parts, 2261 and 8140, that added together give a palindrome (10401).

The spelling of 22618140 in words is "twenty-two million, six hundred eighteen thousand, one hundred forty".