20001013001 has 4 divisors (see below), whose sum is σ = 20001996612. Its totient is φ = 20000029392.

The previous prime is 20001012961. The next prime is 20001013031. The reversal of 20001013001 is 10031010002.

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 18807379600 + 1193633401 = 137140^2 + 34549^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001013001 - 2⁶ = 20001012937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20001013001.

It is not an unprimeable number, because it can be changed into a prime (20001013031) 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, 460646 + ... + 502191.

It is an arithmetic number, because the mean of its divisors is an integer number (5000499153).

Almost surely, 2^20001013001 is an apocalyptic number.

It is an amenable number.

20001013001 is a deficient number, since it is larger than the sum of its proper divisors (983611).

20001013001 is an equidigital number, since it uses as much as digits as its factorization.

20001013001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983610.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 20001013001 its reverse (10031010002), we get a palindrome (30032023003).

The spelling of 20001013001 in words is "twenty billion, one million, thirteen thousand, one".