20790903 has 8 divisors (see below), whose sum is σ = 31681408. Its totient is φ = 11880504.

The previous prime is 20790901. The next prime is 20790937. The reversal of 20790903 is 30909702.

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

It is not a de Polignac number, because 20790903 - 2¹ = 20790901 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 (20790901) 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 7 ways as a sum of consecutive naturals, for example, 495001 + ... + 495042.

It is an arithmetic number, because the mean of its divisors is an integer number (3960176).

Almost surely, 2^20790903 is an apocalyptic number.

20790903 is a deficient number, since it is larger than the sum of its proper divisors (10890505).

20790903 is an equidigital number, since it uses as much as digits as its factorization.

20790903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990053.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 20790903 is about 4559.7042667261. The cubic root of 20790903 is about 274.9736746150.

The spelling of 20790903 in words is "twenty million, seven hundred ninety thousand, nine hundred three".