20011002001 has 8 divisors (see below), whose sum is σ = 20164147200. Its totient is φ = 19858383072.

The previous prime is 20011001987. The next prime is 20011002007. The reversal of 20011002001 is 10020011002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011002001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011002007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55060 + ... + 207493.

It is an arithmetic number, because the mean of its divisors is an integer number (2520518400).

Almost surely, 2^20011002001 is an apocalyptic number.

It is an amenable number.

20011002001 is a deficient number, since it is larger than the sum of its proper divisors (153145199).

20011002001 is a wasteful number, since it uses less digits than its factorization.

20011002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263135.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20011002001 its reverse (10020011002), we get a palindrome (30031013003).

Subtracting from 20011002001 its reverse (10020011002), we obtain a palindrome (9990990999).

The spelling of 20011002001 in words is "twenty billion, eleven million, two thousand, one".