20443609521199 has 2 divisors, whose sum is σ = 20443609521200. Its totient is φ = 20443609521198.

The previous prime is 20443609521161. The next prime is 20443609521323. The reversal of 20443609521199 is 99112590634402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20443609521199 - 2⁹ = 20443609520687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20443609521119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221804760599 + 10221804760600.

It is an arithmetic number, because the mean of its divisors is an integer number (10221804760600).

Almost surely, 2^{20443609521199} is an apocalyptic number.

20443609521199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20443609521199 is an equidigital number, since it uses as much as digits as its factorization.

20443609521199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 20443609521199 in words is "twenty trillion, four hundred forty-three billion, six hundred nine million, five hundred twenty-one thousand, one hundred ninety-nine".