21885383 has 4 divisors (see below), whose sum is σ = 23568888. Its totient is φ = 20201880.

The previous prime is 21885373. The next prime is 21885407. The reversal of 21885383 is 38358812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21885383 - 2⁶ = 21885319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21885313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 841733 + ... + 841758.

It is an arithmetic number, because the mean of its divisors is an integer number (5892222).

Almost surely, 2^21885383 is an apocalyptic number.

21885383 is a deficient number, since it is larger than the sum of its proper divisors (1683505).

21885383 is a wasteful number, since it uses less digits than its factorization.

21885383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683504.

The product of its digits is 46080, while the sum is 38.

The square root of 21885383 is about 4678.1815911741. The cubic root of 21885383 is about 279.7164774633.

The spelling of 21885383 in words is "twenty-one million, eight hundred eighty-five thousand, three hundred eighty-three".