20443609521201 has 16 divisors (see below), whose sum is σ = 28863222260544. Its totient is φ = 12826626891264.

The previous prime is 20443609521199. The next prime is 20443609521323. The reversal of 20443609521201 is 10212590634402.

It is not a de Polignac number, because 20443609521201 - 2¹ = 20443609521199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20443609521201.

It is not an unprimeable number, because it can be changed into a prime (20443609501201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10600836 + ... + 12380021.

It is an arithmetic number, because the mean of its divisors is an integer number (1803951391284).

Almost surely, 2^{20443609521201} is an apocalyptic number.

It is an amenable number.

20443609521201 is a deficient number, since it is larger than the sum of its proper divisors (8419612739343).

20443609521201 is a wasteful number, since it uses less digits than its factorization.

20443609521201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22998320.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 20443609521201 in words is "twenty trillion, four hundred forty-three billion, six hundred nine million, five hundred twenty-one thousand, two hundred one".