20013031223 has 4 divisors (see below), whose sum is σ = 20190137808. Its totient is φ = 19835924640.

The previous prime is 20013031217. The next prime is 20013031231. The reversal of 20013031223 is 32213031002.

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 20013031223 - 2¹⁰ = 20013030199 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 (20013031823) 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, 88553123 + ... + 88553348.

It is an arithmetic number, because the mean of its divisors is an integer number (5047534452).

Almost surely, 2^20013031223 is an apocalyptic number.

20013031223 is a deficient number, since it is larger than the sum of its proper divisors (177106585).

20013031223 is a wasteful number, since it uses less digits than its factorization.

20013031223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177106584.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20013031223 its reverse (32213031002), we get a palindrome (52226062225).

The spelling of 20013031223 in words is "twenty billion, thirteen million, thirty-one thousand, two hundred twenty-three".