20001200001 has 8 divisors (see below), whose sum is σ = 27389030784. Its totient is φ = 12973751280.

The previous prime is 20001199973. The next prime is 20001200047. The reversal of 20001200001 is 10000210002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20001200001 - 2⁶ = 20001199937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20001205001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90095385 + ... + 90095606.

It is an arithmetic number, because the mean of its divisors is an integer number (3423628848).

Almost surely, 2^20001200001 is an apocalyptic number.

It is an amenable number.

20001200001 is a deficient number, since it is larger than the sum of its proper divisors (7387830783).

20001200001 is a wasteful number, since it uses less digits than its factorization.

20001200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180191031.

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 20001200001 its reverse (10000210002), we get a palindrome (30001410003).

The spelling of 20001200001 in words is "twenty billion, one million, two hundred thousand, one".