21873883 has 16 divisors (see below), whose sum is σ = 24567840. Its totient is φ = 19353600.

The previous prime is 21873877. The next prime is 21873889. The reversal of 21873883 is 38837812.

It is an interprime number because it is at equal distance from previous prime (21873877) and next prime (21873889).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21873883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21873889) 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, 77703 + ... + 77983.

It is an arithmetic number, because the mean of its divisors is an integer number (1535490).

Almost surely, 2^21873883 is an apocalyptic number.

21873883 is a deficient number, since it is larger than the sum of its proper divisors (2693957).

21873883 is a wasteful number, since it uses less digits than its factorization.

21873883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558.

The product of its digits is 64512, while the sum is 40.

The square root of 21873883 is about 4676.9523196201. The cubic root of 21873883 is about 279.6674751515.

The spelling of 21873883 in words is "twenty-one million, eight hundred seventy-three thousand, eight hundred eighty-three".