21968883 has 12 divisors (see below), whose sum is σ = 33403240. Its totient is φ = 13874976.

The previous prime is 21968867. The next prime is 21968899. The reversal of 21968883 is 38886912.

It is an interprime number because it is at equal distance from previous prime (21968867) and next prime (21968899).

It is not a de Polignac number, because 21968883 - 2⁴ = 21968867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21968803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64066 + ... + 64407.

Almost surely, 2^21968883 is an apocalyptic number.

21968883 is a deficient number, since it is larger than the sum of its proper divisors (11434357).

21968883 is a wasteful number, since it uses less digits than its factorization.

21968883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128498 (or 128495 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 21968883 is about 4687.0975027196. The cubic root of 21968883 is about 280.0717630684.

The spelling of 21968883 in words is "twenty-one million, nine hundred sixty-eight thousand, eight hundred eighty-three".