20426212 has 24 divisors (see below), whose sum is σ = 36461880. Its totient is φ = 10010880.

The previous prime is 20426209. The next prime is 20426233. The reversal of 20426212 is 21262402.

It can be written as a sum of positive squares in 4 ways, for example, as 2903616 + 17522596 = 1704^2 + 4186^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20426212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64278 + ... + 64594.

It is an arithmetic number, because the mean of its divisors is an integer number (1519245).

Almost surely, 2^20426212 is an apocalyptic number.

It is an amenable number.

20426212 is a deficient number, since it is larger than the sum of its proper divisors (16035668).

20426212 is a wasteful number, since it uses less digits than its factorization.

20426212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20426212 is about 4519.5367019198. The cubic root of 20426212 is about 273.3564201532.

Adding to 20426212 its reverse (21262402), we get a palindrome (41688614).

The spelling of 20426212 in words is "twenty million, four hundred twenty-six thousand, two hundred twelve".