20320903 has 8 divisors (see below), whose sum is σ = 21165696. Its totient is φ = 19488000.

The previous prime is 20320877. The next prime is 20320907. The reversal of 20320903 is 30902302.

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 20320903 - 2¹⁷ = 20189831 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 (20320907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603 + ... + 6403.

It is an arithmetic number, because the mean of its divisors is an integer number (2645712).

Almost surely, 2^20320903 is an apocalyptic number.

20320903 is a deficient number, since it is larger than the sum of its proper divisors (844793).

20320903 is a wasteful number, since it uses less digits than its factorization.

20320903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 20320903 is about 4507.8712270871. The cubic root of 20320903 is about 272.8858400886.

The spelling of 20320903 in words is "twenty million, three hundred twenty thousand, nine hundred three".