20212205 has 16 divisors (see below), whose sum is σ = 26382720. Its totient is φ = 14776128.

The previous prime is 20212187. The next prime is 20212223. The reversal of 20212205 is 50221202.

It is an interprime number because it is at equal distance from previous prime (20212187) and next prime (20212223).

It is a cyclic number.

It is not a de Polignac number, because 20212205 - 2⁸ = 20211949 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5186 + ... + 8204.

It is an arithmetic number, because the mean of its divisors is an integer number (1648920).

Almost surely, 2^20212205 is an apocalyptic number.

It is an amenable number.

20212205 is a deficient number, since it is larger than the sum of its proper divisors (6170515).

20212205 is a wasteful number, since it uses less digits than its factorization.

20212205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20212205 is about 4495.7985942433. The cubic root of 20212205 is about 272.3984078272.

Adding to 20212205 its reverse (50221202), we get a palindrome (70433407).

The spelling of 20212205 in words is "twenty million, two hundred twelve thousand, two hundred five".