20320323303 has 16 divisors (see below), whose sum is σ = 31004384256. Its totient is φ = 11596582560.

The previous prime is 20320323301. The next prime is 20320323307. The reversal of 20320323303 is 30332302302.

It is not a de Polignac number, because 20320323303 - 2¹ = 20320323301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20320323303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320323301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609663 + ... + 642128.

It is an arithmetic number, because the mean of its divisors is an integer number (1937774016).

Almost surely, 2^20320323303 is an apocalyptic number.

20320323303 is a deficient number, since it is larger than the sum of its proper divisors (10684060953).

20320323303 is a wasteful number, since it uses less digits than its factorization.

20320323303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252574.

The product of its (nonzero) digits is 1944, while the sum is 21.

Adding to 20320323303 its reverse (30332302302), we get a palindrome (50652625605).

The spelling of 20320323303 in words is "twenty billion, three hundred twenty million, three hundred twenty-three thousand, three hundred three".