20023231440031 has 16 divisors (see below), whose sum is σ = 20531020333824. Its totient is φ = 19517362994304.

The previous prime is 20023231440013. The next prime is 20023231440053. The reversal of 20023231440031 is 13004413232002.

It is a cyclic number.

It is not a de Polignac number, because 20023231440031 - 2¹⁷ = 20023231308959 is a prime.

It is a super-2 number, since 2×20023231440031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20023231439978 and 20023231440005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023231440731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502356855 + ... + 502396711.

It is an arithmetic number, because the mean of its divisors is an integer number (1283188770864).

Almost surely, 2^{20023231440031} is an apocalyptic number.

20023231440031 is a deficient number, since it is larger than the sum of its proper divisors (507788893793).

20023231440031 is a wasteful number, since it uses less digits than its factorization.

20023231440031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63630.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20023231440031 its reverse (13004413232002), we get a palindrome (33027644672033).

The spelling of 20023231440031 in words is "twenty trillion, twenty-three billion, two hundred thirty-one million, four hundred forty thousand, thirty-one".