20012205 has 16 divisors (see below), whose sum is σ = 33053184. Its totient is φ = 10328640.

The previous prime is 20012203. The next prime is 20012207. The reversal of 20012205 is 50221002.

It is an interprime number because it is at equal distance from previous prime (20012203) and next prime (20012207).

It is not a de Polignac number, because 20012205 - 2¹ = 20012203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21054 + ... + 21983.

It is an arithmetic number, because the mean of its divisors is an integer number (2065824).

Almost surely, 2^20012205 is an apocalyptic number.

It is an amenable number.

20012205 is a deficient number, since it is larger than the sum of its proper divisors (13040979).

20012205 is a wasteful number, since it uses less digits than its factorization.

20012205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43076.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 20012205 is about 4473.5003073656. The cubic root of 20012205 is about 271.4969662098.

Adding to 20012205 its reverse (50221002), we get a palindrome (70233207).

The spelling of 20012205 in words is "twenty million, twelve thousand, two hundred five".