20810212 has 6 divisors (see below), whose sum is σ = 36417878. Its totient is φ = 10405104.

The previous prime is 20810203. The next prime is 20810219. The reversal of 20810212 is 21201802.

It can be written as a sum of positive squares in only one way, i.e., 18198756 + 2611456 = 4266^2 + 1616^2 .

It is not an unprimeable number, because it can be changed into a prime (20810219) 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 as a sum of consecutive naturals, namely, 2601273 + ... + 2601280.

Almost surely, 2^20810212 is an apocalyptic number.

It is an amenable number.

20810212 is a deficient number, since it is larger than the sum of its proper divisors (15607666).

20810212 is a wasteful number, since it uses less digits than its factorization.

20810212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202557 (or 5202555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 20810212 is about 4561.8211275761. The cubic root of 20810212 is about 275.0587731130.

The spelling of 20810212 in words is "twenty million, eight hundred ten thousand, two hundred twelve".