20100212 has 24 divisors (see below), whose sum is σ = 38761632. Its totient is φ = 9044000.

The previous prime is 20100203. The next prime is 20100217. The reversal of 20100212 is 21200102.

It is a self number, because there is not a number n which added to its sum of digits gives 20100212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2183 + ... + 6705.

It is an arithmetic number, because the mean of its divisors is an integer number (1615068).

Almost surely, 2^20100212 is an apocalyptic number.

20100212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20100212 is a deficient number, since it is larger than the sum of its proper divisors (18661420).

20100212 is a wasteful number, since it uses less digits than its factorization.

20100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4639 (or 4637 counting only the distinct ones).

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

The square root of 20100212 is about 4483.3259975157. The cubic root of 20100212 is about 271.8943685853.

Adding to 20100212 its reverse (21200102), we get a palindrome (41300314).

The spelling of 20100212 in words is "twenty million, one hundred thousand, two hundred twelve".