20321002132199 has 4 divisors (see below), whose sum is σ = 20400072179664. Its totient is φ = 20241932084736.

The previous prime is 20321002132187. The next prime is 20321002132243. The reversal of 20321002132199 is 99123120012302.

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-20321002132199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321002132799) 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, 39535023347 + ... + 39535023860.

It is an arithmetic number, because the mean of its divisors is an integer number (5100018044916).

Almost surely, 2^{20321002132199} is an apocalyptic number.

20321002132199 is a deficient number, since it is larger than the sum of its proper divisors (79070047465).

20321002132199 is an equidigital number, since it uses as much as digits as its factorization.

20321002132199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79070047464.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 20321002132199 in words is "twenty trillion, three hundred twenty-one billion, two million, one hundred thirty-two thousand, one hundred ninety-nine".