31203320023 has 4 divisors (see below), whose sum is σ = 31203703728. Its totient is φ = 31202936320.

The previous prime is 31203320017. The next prime is 31203320039. The reversal of 31203320023 is 32002330213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31203320023 - 2²⁹ = 30666449111 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 (31203320923) 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, 16363 + ... + 250348.

It is an arithmetic number, because the mean of its divisors is an integer number (7800925932).

Almost surely, 2^31203320023 is an apocalyptic number.

31203320023 is a deficient number, since it is larger than the sum of its proper divisors (383705).

31203320023 is a wasteful number, since it uses less digits than its factorization.

31203320023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383704.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 31203320023 its reverse (32002330213), we get a palindrome (63205650236).

The spelling of 31203320023 in words is "thirty-one billion, two hundred three million, three hundred twenty thousand, twenty-three".