31030020023 has 4 divisors (see below), whose sum is σ = 31220388408. Its totient is φ = 30839651640.

The previous prime is 31030019989. The next prime is 31030020053. The reversal of 31030020023 is 32002003013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32002003013 = 2069 ⋅15467377.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31030020023 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 (31030020053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95183948 + ... + 95184273.

It is an arithmetic number, because the mean of its divisors is an integer number (7805097102).

Almost surely, 2^31030020023 is an apocalyptic number.

31030020023 is a deficient number, since it is larger than the sum of its proper divisors (190368385).

31030020023 is a wasteful number, since it uses less digits than its factorization.

31030020023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190368384.

The product of its (nonzero) digits is 108, while the sum is 14.

Adding to 31030020023 its reverse (32002003013), we get a palindrome (63032023036).

The spelling of 31030020023 in words is "thirty-one billion, thirty million, twenty thousand, twenty-three".