31021020023 has 8 divisors (see below), whose sum is σ = 36994011648. Its totient is φ = 25433382744.

The previous prime is 31021019983. The next prime is 31021020061. The reversal of 31021020023 is 32002012013.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31021020023 - 2¹⁰ = 31021018999 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 (31021020083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96338411 + ... + 96338732.

It is an arithmetic number, because the mean of its divisors is an integer number (4624251456).

Almost surely, 2^31021020023 is an apocalyptic number.

31021020023 is a deficient number, since it is larger than the sum of its proper divisors (5972991625).

31021020023 is a wasteful number, since it uses less digits than its factorization.

31021020023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192677173.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31021020023 its reverse (32002012013), we get a palindrome (63023032036).

The spelling of 31021020023 in words is "thirty-one billion, twenty-one million, twenty thousand, twenty-three".