20001332123023 has 4 divisors (see below), whose sum is σ = 20646536385088. Its totient is φ = 19356127860960.

The previous prime is 20001332122979. The next prime is 20001332123033. The reversal of 20001332123023 is 32032123310002.

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 20001332123023 - 2¹³ = 20001332114831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001332122985 and 20001332123003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001332123033) 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, 322602130986 + ... + 322602131047.

It is an arithmetic number, because the mean of its divisors is an integer number (5161634096272).

Almost surely, 2^{20001332123023} is an apocalyptic number.

20001332123023 is a deficient number, since it is larger than the sum of its proper divisors (645204262065).

20001332123023 is an equidigital number, since it uses as much as digits as its factorization.

20001332123023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645204262064.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20001332123023 its reverse (32032123310002), we get a palindrome (52033455433025).

The spelling of 20001332123023 in words is "twenty trillion, one billion, three hundred thirty-two million, one hundred twenty-three thousand, twenty-three".