20001117280023 has 96 divisors (see below), whose sum is σ = 32743562342400. Its totient is φ = 11659141857600.

The previous prime is 20001117279973. The next prime is 20001117280031. The reversal of 20001117280023 is 32008271110002.

It is not a de Polignac number, because 20001117280023 - 2⁹ = 20001117279511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001117280043) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1013269288 + ... + 1013289026.

It is an arithmetic number, because the mean of its divisors is an integer number (341078774400).

Almost surely, 2^{20001117280023} is an apocalyptic number.

20001117280023 is a deficient number, since it is larger than the sum of its proper divisors (12742445062377).

20001117280023 is a wasteful number, since it uses less digits than its factorization.

20001117280023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23553 (or 23550 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

Adding to 20001117280023 its reverse (32008271110002), we get a palindrome (52009388390025).

The spelling of 20001117280023 in words is "twenty trillion, one billion, one hundred seventeen million, two hundred eighty thousand, twenty-three".