20321440421199 has 4 divisors (see below), whose sum is σ = 27095253894936. Its totient is φ = 13547626947464.

The previous prime is 20321440421197. The next prime is 20321440421327. The reversal of 20321440421199 is 99112404412302.

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 20321440421199 - 2¹ = 20321440421197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20321440421199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321440421197) 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, 3386906736864 + ... + 3386906736869.

It is an arithmetic number, because the mean of its divisors is an integer number (6773813473734).

Almost surely, 2^{20321440421199} is an apocalyptic number.

20321440421199 is a deficient number, since it is larger than the sum of its proper divisors (6773813473737).

20321440421199 is an equidigital number, since it uses as much as digits as its factorization.

20321440421199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6773813473736.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 20321440421199 in words is "twenty trillion, three hundred twenty-one billion, four hundred forty million, four hundred twenty-one thousand, one hundred ninety-nine".