22421956 has 6 divisors (see below), whose sum is σ = 39238430. Its totient is φ = 11210976.

The previous prime is 22421939. The next prime is 22421983. The reversal of 22421956 is 65912422.

It can be written as a sum of positive squares in only one way, i.e., 16974400 + 5447556 = 4120^2 + 2334^2 .

It is a super-2 number, since 2×22421956² = 1005488221731872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2802741 + ... + 2802748.

Almost surely, 2^22421956 is an apocalyptic number.

It is an amenable number.

22421956 is a deficient number, since it is larger than the sum of its proper divisors (16816474).

22421956 is a wasteful number, since it uses less digits than its factorization.

22421956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5605493 (or 5605491 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 22421956 is about 4735.1827842228. The cubic root of 22421956 is about 281.9840206897.

The spelling of 22421956 in words is "twenty-two million, four hundred twenty-one thousand, nine hundred fifty-six".