21974333 has 16 divisors (see below), whose sum is σ = 23417856. Its totient is φ = 20595120.

The previous prime is 21974321. The next prime is 21974357. The reversal of 21974333 is 33347912.

It is a cyclic number.

It is not a de Polignac number, because 21974333 - 2⁸ = 21974077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21974333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21974033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167678 + ... + 167808.

It is an arithmetic number, because the mean of its divisors is an integer number (1463616).

Almost surely, 2^21974333 is an apocalyptic number.

It is an amenable number.

21974333 is a deficient number, since it is larger than the sum of its proper divisors (1443523).

21974333 is a wasteful number, since it uses less digits than its factorization.

21974333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304.

The product of its digits is 13608, while the sum is 32.

The square root of 21974333 is about 4687.6788499214. The cubic root of 21974333 is about 280.0949210491.

The spelling of 21974333 in words is "twenty-one million, nine hundred seventy-four thousand, three hundred thirty-three".