20312123303 has 4 divisors (see below), whose sum is σ = 20314494600. Its totient is φ = 20309752008.

The previous prime is 20312123297. The next prime is 20312123309. The reversal of 20312123303 is 30332121302.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20312123297) and next prime (20312123309).

It is a cyclic number.

It is not a de Polignac number, because 20312123303 - 2¹⁸ = 20311861159 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 (20312123309) 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, 1172753 + ... + 1189946.

It is an arithmetic number, because the mean of its divisors is an integer number (5078623650).

Almost surely, 2^20312123303 is an apocalyptic number.

20312123303 is a deficient number, since it is larger than the sum of its proper divisors (2371297).

20312123303 is an equidigital number, since it uses as much as digits as its factorization.

20312123303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371296.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20312123303 its reverse (30332121302), we get a palindrome (50644244605).

The spelling of 20312123303 in words is "twenty billion, three hundred twelve million, one hundred twenty-three thousand, three hundred three".