20321002133023 has 4 divisors (see below), whose sum is σ = 20325577909168. Its totient is φ = 20316426356880.

The previous prime is 20321002132943. The next prime is 20321002133039. The reversal of 20321002133023 is 32033120012302.

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 20321002133023 - 2³³ = 20312412198431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321002132985 and 20321002133003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321002133063) 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, 2287881411 + ... + 2287890292.

It is an arithmetic number, because the mean of its divisors is an integer number (5081394477292).

Almost surely, 2^{20321002133023} is an apocalyptic number.

20321002133023 is a deficient number, since it is larger than the sum of its proper divisors (4575776145).

20321002133023 is an equidigital number, since it uses as much as digits as its factorization.

20321002133023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575776144.

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

Adding to 20321002133023 its reverse (32033120012302), we get a palindrome (52354122145325).

The spelling of 20321002133023 in words is "twenty trillion, three hundred twenty-one billion, two million, one hundred thirty-three thousand, twenty-three".