20200220001 has 18 divisors (see below), whose sum is σ = 31595218278. Its totient is φ = 12430903680.

The previous prime is 20200219997. The next prime is 20200220009. The reversal of 20200220001 is 10002200202.

It can be written as a sum of positive squares in 3 ways, for example, as 183629601 + 20016590400 = 13551^2 + 141480^2 .

It is not a de Polignac number, because 20200220001 - 2² = 20200219997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20200220009) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6638920 + ... + 6641961.

Almost surely, 2^20200220001 is an apocalyptic number.

It is an amenable number.

20200220001 is a deficient number, since it is larger than the sum of its proper divisors (11394998277).

20200220001 is a wasteful number, since it uses less digits than its factorization.

20200220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13280913 (or 13280897 counting only the distinct ones).

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

Adding to 20200220001 its reverse (10002200202), we get a palindrome (30202420203).

The spelling of 20200220001 in words is "twenty billion, two hundred million, two hundred twenty thousand, one".