20123231332031 has 4 divisors (see below), whose sum is σ = 20125085505912. Its totient is φ = 20121377158152.

The previous prime is 20123231331971. The next prime is 20123231332049. The reversal of 20123231332031 is 13023313232102.

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 20123231332031 - 2¹⁴ = 20123231315647 is a prime.

It is a super-2 number, since 2×20123231332031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123231332231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927070661 + ... + 927092366.

It is an arithmetic number, because the mean of its divisors is an integer number (5031271376478).

Almost surely, 2^{20123231332031} is an apocalyptic number.

20123231332031 is a deficient number, since it is larger than the sum of its proper divisors (1854173881).

20123231332031 is a wasteful number, since it uses less digits than its factorization.

20123231332031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854173880.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 20123231332031 its reverse (13023313232102), we get a palindrome (33146544564133).

The spelling of 20123231332031 in words is "twenty trillion, one hundred twenty-three billion, two hundred thirty-one million, three hundred thirty-two thousand, thirty-one".