21935933 has 8 divisors (see below), whose sum is σ = 23357880. Its totient is φ = 20528640.

The previous prime is 21935917. The next prime is 21935939. The reversal of 21935933 is 33953912.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1532644 + 20403289 = 1238^2 + 4517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21935933 - 2⁴ = 21935917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21935893 and 21935902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21935939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488 + ... + 6641.

It is an arithmetic number, because the mean of its divisors is an integer number (2919735).

Almost surely, 2^21935933 is an apocalyptic number.

It is an amenable number.

21935933 is a deficient number, since it is larger than the sum of its proper divisors (1421947).

21935933 is a wasteful number, since it uses less digits than its factorization.

21935933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7327.

The product of its digits is 21870, while the sum is 35.

The square root of 21935933 is about 4683.5812152668. The cubic root of 21935933 is about 279.9316712522.

The spelling of 21935933 in words is "twenty-one million, nine hundred thirty-five thousand, nine hundred thirty-three".