20000020100023 has 4 divisors (see below), whose sum is σ = 20001365377560. Its totient is φ = 19998674822488.

The previous prime is 20000020099937. The next prime is 20000020100087. The reversal of 20000020100023 is 32000102000002.

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-20000020100023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000020099982 and 20000020100009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000020101023) 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, 672616468 + ... + 672646201.

It is an arithmetic number, because the mean of its divisors is an integer number (5000341344390).

Almost surely, 2^{20000020100023} is an apocalyptic number.

20000020100023 is a deficient number, since it is larger than the sum of its proper divisors (1345277537).

20000020100023 is a wasteful number, since it uses less digits than its factorization.

20000020100023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345277536.

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 20000020100023 its reverse (32000102000002), we get a palindrome (52000122100025).

The spelling of 20000020100023 in words is "twenty trillion, twenty million, one hundred thousand, twenty-three".