22581340 has 24 divisors (see below), whose sum is σ = 47531232. Its totient is φ = 9011520.

The previous prime is 22581323. The next prime is 22581341. The reversal of 22581340 is 4318522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22581341) 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, 9777 + ... + 11863.

It is an arithmetic number, because the mean of its divisors is an integer number (1980468).

Almost surely, 2^22581340 is an apocalyptic number.

22581340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22581340 is an abundant number, since it is smaller than the sum of its proper divisors (24949892).

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

22581340 is a wasteful number, since it uses less digits than its factorization.

22581340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637 (or 2635 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 22581340 is about 4751.9827440764. The cubic root of 22581340 is about 282.6505945185.

Adding to 22581340 its reverse (4318522), we get a palindrome (26899862).

The spelling of 22581340 in words is "twenty-two million, five hundred eighty-one thousand, three hundred forty".