20320121010023 has 4 divisors (see below), whose sum is σ = 20320315059048. Its totient is φ = 20319926961000.

The previous prime is 20320121009959. The next prime is 20320121010029. The reversal of 20320121010023 is 32001012102302.

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 20320121010023 - 2⁶ = 20320121009959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20320121009983 and 20320121010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320121010029) 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, 96867353 + ... + 97076898.

It is an arithmetic number, because the mean of its divisors is an integer number (5080078764762).

Almost surely, 2^{20320121010023} is an apocalyptic number.

20320121010023 is a deficient number, since it is larger than the sum of its proper divisors (194049025).

20320121010023 is a wasteful number, since it uses less digits than its factorization.

20320121010023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194049024.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20320121010023 its reverse (32001012102302), we get a palindrome (52321133112325).

The spelling of 20320121010023 in words is "twenty trillion, three hundred twenty billion, one hundred twenty-one million, ten thousand, twenty-three".