20011231012023 has 32 divisors (see below), whose sum is σ = 31033622016000. Its totient is φ = 12728633954400.

The previous prime is 20011231011833. The next prime is 20011231012043. The reversal of 20011231012023 is 32021013211002.

20011231012023 is a `hidden beast` number, since 200 + 1 + 12 + 310 + 120 + 23 = 666.

It is not a de Polignac number, because 20011231012023 - 2¹⁷ = 20011230880951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011231011987 and 20011231012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011231012043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168308748 + ... + 168427601.

It is an arithmetic number, because the mean of its divisors is an integer number (969800688000).

Almost surely, 2^{20011231012023} is an apocalyptic number.

20011231012023 is a deficient number, since it is larger than the sum of its proper divisors (11022391003977).

20011231012023 is a wasteful number, since it uses less digits than its factorization.

20011231012023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336736460 (or 336736454 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20011231012023 its reverse (32021013211002), we get a palindrome (52032244223025).

The spelling of 20011231012023 in words is "twenty trillion, eleven billion, two hundred thirty-one million, twelve thousand, twenty-three".