20143212 has 12 divisors (see below), whose sum is σ = 47000856. Its totient is φ = 6714400.

The previous prime is 20143171. The next prime is 20143219. The reversal of 20143212 is 21234102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20143191 and 20143200.

It is not an unprimeable number, because it can be changed into a prime (20143219) 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 in 3 ways as a sum of consecutive naturals, for example, 839289 + ... + 839312.

It is an arithmetic number, because the mean of its divisors is an integer number (3916738).

Almost surely, 2^20143212 is an apocalyptic number.

It is an amenable number.

20143212 is an abundant number, since it is smaller than the sum of its proper divisors (26857644).

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

20143212 is a wasteful number, since it uses less digits than its factorization.

20143212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678608 (or 1678606 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20143212 is about 4488.1189823800. The cubic root of 20143212 is about 272.0881166354.

Adding to 20143212 its reverse (21234102), we get a palindrome (41377314).

The spelling of 20143212 in words is "twenty million, one hundred forty-three thousand, two hundred twelve".