20868383 has 4 divisors (see below), whose sum is σ = 21775728. Its totient is φ = 19961040.

The previous prime is 20868361. The next prime is 20868389. The reversal of 20868383 is 38386802.

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 20868383 - 2⁶ = 20868319 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 (20868389) 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, 453638 + ... + 453683.

It is an arithmetic number, because the mean of its divisors is an integer number (5443932).

Almost surely, 2^20868383 is an apocalyptic number.

20868383 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20868383 is a deficient number, since it is larger than the sum of its proper divisors (907345).

20868383 is an equidigital number, since it uses as much as digits as its factorization.

20868383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907344.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 20868383 is about 4568.1925309689. The cubic root of 20868383 is about 275.3148262191.

The spelling of 20868383 in words is "twenty million, eight hundred sixty-eight thousand, three hundred eighty-three".