20303121223 has 16 divisors (see below), whose sum is σ = 26413549056. Its totient is φ = 15132759840.

The previous prime is 20303121109. The next prime is 20303121229. The reversal of 20303121223 is 32212130302.

It is not a de Polignac number, because 20303121223 - 2⁹ = 20303120711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20303121223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303121229) 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, 5730336 + ... + 5733877.

It is an arithmetic number, because the mean of its divisors is an integer number (1650846816).

Almost surely, 2^20303121223 is an apocalyptic number.

20303121223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20303121223 is a deficient number, since it is larger than the sum of its proper divisors (6110427833).

20303121223 is a wasteful number, since it uses less digits than its factorization.

20303121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11464254.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20303121223 its reverse (32212130302), we get a palindrome (52515251525).

The spelling of 20303121223 in words is "twenty billion, three hundred three million, one hundred twenty-one thousand, two hundred twenty-three".