20001212 has 36 divisors (see below), whose sum is σ = 44423064. Its totient is φ = 7791840.

The previous prime is 20001203. The next prime is 20001217. The reversal of 20001212 is 21210002.

It is a self number, because there is not a number n which added to its sum of digits gives 20001212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2483 + ... + 6794.

It is an arithmetic number, because the mean of its divisors is an integer number (1233974).

Almost surely, 2^20001212 is an apocalyptic number.

20001212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20001212 is an abundant number, since it is smaller than the sum of its proper divisors (24421852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001212 is a wasteful number, since it uses less digits than its factorization.

20001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9306 (or 9297 counting only the distinct ones).

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

The square root of 20001212 is about 4472.2714586662. The cubic root of 20001212 is about 271.4472446723.

Adding to 20001212 its reverse (21210002), we get a palindrome (41211214).

The spelling of 20001212 in words is "twenty million, one thousand, two hundred twelve".