20010022001 has 4 divisors (see below), whose sum is σ = 20011084404. Its totient is φ = 20008959600.

The previous prime is 20010021961. The next prime is 20010022009. The reversal of 20010022001 is 10022001002.

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 17429280400 + 2580741601 = 132020^2 + 50801^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010022001 - 2⁶ = 20010021937 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 20010022001.

It is not an unprimeable number, because it can be changed into a prime (20010022009) 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, 502430 + ... + 540791.

It is an arithmetic number, because the mean of its divisors is an integer number (5002771101).

Almost surely, 2^20010022001 is an apocalyptic number.

It is an amenable number.

20010022001 is a deficient number, since it is larger than the sum of its proper divisors (1062403).

20010022001 is a wasteful number, since it uses less digits than its factorization.

20010022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062402.

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

Adding to 20010022001 its reverse (10022001002), we get a palindrome (30032023003).

The spelling of 20010022001 in words is "twenty billion, ten million, twenty-two thousand, one".