22505660 has 12 divisors (see below), whose sum is σ = 47261928. Its totient is φ = 9002256.

The previous prime is 22505627. The next prime is 22505663. The reversal of 22505660 is 6650522.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22505663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562622 + ... + 562661.

It is an arithmetic number, because the mean of its divisors is an integer number (3938494).

Almost surely, 2^22505660 is an apocalyptic number.

22505660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22505660 is an abundant number, since it is smaller than the sum of its proper divisors (24756268).

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

22505660 is a wasteful number, since it uses less digits than its factorization.

22505660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125292 (or 1125290 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 22505660 is about 4744.0130691220. The cubic root of 22505660 is about 282.3344789637.

The spelling of 22505660 in words is "twenty-two million, five hundred five thousand, six hundred sixty".