20002020001 has 4 divisors (see below), whose sum is σ = 20023367812. Its totient is φ = 19980672192.

The previous prime is 20002019963. The next prime is 20002020013. The reversal of 20002020001 is 10002020002.

It is a happy number.

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 9305496225 + 10696523776 = 96465^2 + 103424^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002020001 - 2¹⁵ = 20001987233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20002120001) 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, 10672500 + ... + 10674373.

It is an arithmetic number, because the mean of its divisors is an integer number (5005841953).

Almost surely, 2^20002020001 is an apocalyptic number.

It is an amenable number.

20002020001 is a deficient number, since it is larger than the sum of its proper divisors (21347811).

20002020001 is an equidigital number, since it uses as much as digits as its factorization.

20002020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21347810.

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

Adding to 20002020001 its reverse (10002020002), we get a palindrome (30004040003).

Subtracting from 20002020001 its reverse (10002020002), we obtain a palindrome (9999999999).

The spelling of 20002020001 in words is "twenty billion, two million, twenty thousand, one".