21933272 has 8 divisors (see below), whose sum is σ = 41124900. Its totient is φ = 10966632.

The previous prime is 21933271. The next prime is 21933287. The reversal of 21933272 is 27233912.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21933271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1370822 + ... + 1370837.

Almost surely, 2^21933272 is an apocalyptic number.

It is an amenable number.

21933272 is a deficient number, since it is larger than the sum of its proper divisors (19191628).

21933272 is a wasteful number, since it uses less digits than its factorization.

21933272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741665 (or 2741661 counting only the distinct ones).

The product of its digits is 4536, while the sum is 29.

The square root of 21933272 is about 4683.2971291602. The cubic root of 21933272 is about 279.9203514951.

The spelling of 21933272 in words is "twenty-one million, nine hundred thirty-three thousand, two hundred seventy-two".