20010212 has 6 divisors (see below), whose sum is σ = 35017878. Its totient is φ = 10005104.

The previous prime is 20010209. The next prime is 20010217. The reversal of 20010212 is 21201002.

It can be written as a sum of positive squares in only one way, i.e., 15413476 + 4596736 = 3926^2 + 2144^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20010212.

It is not an unprimeable number, because it can be changed into a prime (20010217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501273 + ... + 2501280.

It is an arithmetic number, because the mean of its divisors is an integer number (5836313).

Almost surely, 2^20010212 is an apocalyptic number.

It is an amenable number.

20010212 is a deficient number, since it is larger than the sum of its proper divisors (15007666).

20010212 is a wasteful number, since it uses less digits than its factorization.

20010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002557 (or 5002555 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20010212 is about 4473.2775456034. The cubic root of 20010212 is about 271.4879531864.

Adding to 20010212 its reverse (21201002), we get a palindrome (41211214).

The spelling of 20010212 in words is "twenty million, ten thousand, two hundred twelve".