21960933 has 4 divisors (see below), whose sum is σ = 29281248. Its totient is φ = 14640620.

The previous prime is 21960931. The next prime is 21960937. The reversal of 21960933 is 33906912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21960933 - 2¹ = 21960931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21960894 and 21960903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21960931) 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 in 3 ways as a sum of consecutive naturals, for example, 3660153 + ... + 3660158.

It is an arithmetic number, because the mean of its divisors is an integer number (7320312).

Almost surely, 2^21960933 is an apocalyptic number.

It is an amenable number.

21960933 is a deficient number, since it is larger than the sum of its proper divisors (7320315).

21960933 is an equidigital number, since it uses as much as digits as its factorization.

21960933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7320314.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 21960933 is about 4686.2493531608. The cubic root of 21960933 is about 280.0379752915.

The spelling of 21960933 in words is "twenty-one million, nine hundred sixty thousand, nine hundred thirty-three".