20312012023 has 4 divisors (see below), whose sum is σ = 20313314440. Its totient is φ = 20310709608.

The previous prime is 20312011999. The next prime is 20312012059. The reversal of 20312012023 is 32021021302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312012023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312011988 and 20312012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312012923) 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, 627528 + ... + 659101.

It is an arithmetic number, because the mean of its divisors is an integer number (5078328610).

Almost surely, 2^20312012023 is an apocalyptic number.

20312012023 is a deficient number, since it is larger than the sum of its proper divisors (1302417).

20312012023 is a wasteful number, since it uses less digits than its factorization.

20312012023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302416.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20312012023 its reverse (32021021302), we get a palindrome (52333033325).

The spelling of 20312012023 in words is "twenty billion, three hundred twelve million, twelve thousand, twenty-three".