20002002001 has 16 divisors (see below), whose sum is σ = 21949014528. Its totient is φ = 18145440000.

The previous prime is 20002001969. The next prime is 20002002089. The reversal of 20002002001 is 10020020002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20002002001 - 2⁵ = 20002001969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002002101) 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, 56671 + ... + 207883.

It is an arithmetic number, because the mean of its divisors is an integer number (1371813408).

Almost surely, 2^20002002001 is an apocalyptic number.

It is an amenable number.

20002002001 is a deficient number, since it is larger than the sum of its proper divisors (1947012527).

20002002001 is a wasteful number, since it uses less digits than its factorization.

20002002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151512.

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 20002002001 its reverse (10020020002), we get a palindrome (30022022003).

The spelling of 20002002001 in words is "twenty billion, two million, two thousand, one".