20939303 has 8 divisors (see below), whose sum is σ = 26106240. Its totient is φ = 16316280.

The previous prime is 20939279. The next prime is 20939329. The reversal of 20939303 is 30393902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20939303 - 2¹⁸ = 20677159 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 (20939333) 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 7 ways as a sum of consecutive naturals, for example, 135893 + ... + 136046.

It is an arithmetic number, because the mean of its divisors is an integer number (3263280).

Almost surely, 2^20939303 is an apocalyptic number.

20939303 is a deficient number, since it is larger than the sum of its proper divisors (5166937).

20939303 is a wasteful number, since it uses less digits than its factorization.

20939303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271957.

The product of its (nonzero) digits is 4374, while the sum is 29.

The square root of 20939303 is about 4575.9483170158. The cubic root of 20939303 is about 275.6263541188.

The spelling of 20939303 in words is "twenty million, nine hundred thirty-nine thousand, three hundred three".