22020002001 has 6 divisors (see below), whose sum is σ = 31806669570. Its totient is φ = 14680001328.

The previous prime is 22020001963. The next prime is 22020002041. The reversal of 22020002001 is 10020002022.

It can be written as a sum of positive squares in only one way, i.e., 20916101376 + 1103900625 = 144624^2 + 33225^2 .

It is not a de Polignac number, because 22020002001 - 2¹⁵ = 22019969233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2446666889 = 22020002001 / (2 + 2 + 0 + 2 + 0 + 0 + 0 + 2 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (22020002041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1223333436 + ... + 1223333453.

It is an arithmetic number, because the mean of its divisors is an integer number (5301111595).

Almost surely, 2^22020002001 is an apocalyptic number.

It is an amenable number.

22020002001 is a deficient number, since it is larger than the sum of its proper divisors (9786667569).

22020002001 is a wasteful number, since it uses less digits than its factorization.

22020002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446666895 (or 2446666892 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 22020002001 its reverse (10020002022), we get a palindrome (32040004023).

The spelling of 22020002001 in words is "twenty-two billion, twenty million, two thousand, one".