20050001 has 4 divisors (see below), whose sum is σ = 20087604. Its totient is φ = 20012400.

The previous prime is 20049989. The next prime is 20050003. The reversal of 20050001 is 10005002.

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 13542400 + 6507601 = 3680^2 + 2551^2 .

It is a cyclic number.

It is not a de Polignac number, because 20050001 - 2⁶ = 20049937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20050003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17990 + ... + 19071.

It is an arithmetic number, because the mean of its divisors is an integer number (5021901).

Almost surely, 2^20050001 is an apocalyptic number.

It is an amenable number.

20050001 is a deficient number, since it is larger than the sum of its proper divisors (37603).

20050001 is an equidigital number, since it uses as much as digits as its factorization.

20050001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37602.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 20050001 is about 4477.7227471115. The cubic root of 20050001 is about 271.6677794042.

Adding to 20050001 its reverse (10005002), we get a palindrome (30055003).

The spelling of 20050001 in words is "twenty million, fifty thousand, one".