20123321303 has 4 divisors (see below), whose sum is σ = 20123829960. Its totient is φ = 20122812648.

The previous prime is 20123321291. The next prime is 20123321333. The reversal of 20123321303 is 30312332102.

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

It is a cyclic number.

It is not a de Polignac number, because 20123321303 - 2²⁸ = 19854885847 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 (20123321333) 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, 189473 + ... + 275946.

It is an arithmetic number, because the mean of its divisors is an integer number (5030957490).

Almost surely, 2^20123321303 is an apocalyptic number.

20123321303 is a deficient number, since it is larger than the sum of its proper divisors (508657).

20123321303 is an equidigital number, since it uses as much as digits as its factorization.

20123321303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508656.

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

Adding to 20123321303 its reverse (30312332102), we get a palindrome (50435653405).

The spelling of 20123321303 in words is "twenty billion, one hundred twenty-three million, three hundred twenty-one thousand, three hundred three".