20050000000001 has 4 divisors (see below), whose sum is σ = 20050393890900. Its totient is φ = 20049606109104.

The previous prime is 20049999999979. The next prime is 20050000000033. The reversal of 20050000000001 is 10000000005002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1940072908225 + 18109927091776 = 1392865^2 + 4255576^2 .

It is a cyclic number.

It is not a de Polignac number, because 20050000000001 - 2²⁶ = 20049932891137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20050000000091) 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, 196869086 + ... + 196970903.

It is an arithmetic number, because the mean of its divisors is an integer number (5012598472725).

Almost surely, 2^{20050000000001} is an apocalyptic number.

It is an amenable number.

20050000000001 is a deficient number, since it is larger than the sum of its proper divisors (393890899).

20050000000001 is an equidigital number, since it uses as much as digits as its factorization.

20050000000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393890898.

The product of its (nonzero) digits is 10, while the sum is 8.

Adding to 20050000000001 its reverse (10000000005002), we get a palindrome (30050000005003).

The spelling of 20050000000001 in words is "twenty trillion, fifty billion, one", and thus it is an aban number and an uban number.