20009101 has 12 divisors (see below), whose sum is σ = 24080220. Its totient is φ = 16558080.

The previous prime is 20009053. The next prime is 20009113. The reversal of 20009101 is 10190002.

It can be written as a sum of positive squares in 2 ways, for example, as 13764100 + 6245001 = 3710^2 + 2499^2 .

It is not a de Polignac number, because 20009101 - 2⁹ = 20008589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20006101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5620 + ... + 8461.

It is an arithmetic number, because the mean of its divisors is an integer number (2006685).

Almost surely, 2^20009101 is an apocalyptic number.

It is an amenable number.

20009101 is a deficient number, since it is larger than the sum of its proper divisors (4071119).

20009101 is a wasteful number, since it uses less digits than its factorization.

20009101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14124 (or 14117 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 20009101 is about 4473.1533620031. The cubic root of 20009101 is about 271.4829286070.

Adding to 20009101 its reverse (10190002), we get a palindrome (30199103).

The spelling of 20009101 in words is "twenty million, nine thousand, one hundred one".