22721670 has 24 divisors (see below), whose sum is σ = 59076576. Its totient is φ = 6059088.

The previous prime is 22721669. The next prime is 22721681. The reversal of 22721670 is 7612722.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126142 + ... + 126321.

It is an arithmetic number, because the mean of its divisors is an integer number (2461524).

Almost surely, 2^22721670 is an apocalyptic number.

22721670 is an abundant number, since it is smaller than the sum of its proper divisors (36354906).

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

22721670 is a wasteful number, since it uses less digits than its factorization.

22721670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252476 (or 252473 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 22721670 is about 4766.7252910148. The cubic root of 22721670 is about 283.2348892906.

The spelling of 22721670 in words is "twenty-two million, seven hundred twenty-one thousand, six hundred seventy".