22721996 has 48 divisors (see below), whose sum is σ = 47228832. Its totient is φ = 9446400.

The previous prime is 22721989. The next prime is 22722023. The reversal of 22721996 is 69912722.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27266 + ... + 28086.

It is an arithmetic number, because the mean of its divisors is an integer number (983934).

Almost surely, 2^22721996 is an apocalyptic number.

It is an amenable number.

22721996 is an abundant number, since it is smaller than the sum of its proper divisors (24506836).

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

22721996 is a wasteful number, since it uses less digits than its factorization.

22721996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 888 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 22721996 is about 4766.7594862758. The cubic root of 22721996 is about 283.2362438585.

The spelling of 22721996 in words is "twenty-two million, seven hundred twenty-one thousand, nine hundred ninety-six".