21963272 has 16 divisors (see below), whose sum is σ = 41436240. Its totient is φ = 10913616.

The previous prime is 21963257. The next prime is 21963287. The reversal of 21963272 is 27236912.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21963257) and next prime (21963287).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7118 + ... + 9725.

It is an arithmetic number, because the mean of its divisors is an integer number (2589765).

Almost surely, 2^21963272 is an apocalyptic number.

It is an amenable number.

21963272 is a deficient number, since it is larger than the sum of its proper divisors (19472968).

21963272 is a wasteful number, since it uses less digits than its factorization.

21963272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17012 (or 17008 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 21963272 is about 4686.4989064332. The cubic root of 21963272 is about 280.0479169695.

The spelling of 21963272 in words is "twenty-one million, nine hundred sixty-three thousand, two hundred seventy-two".