20543212 has 12 divisors (see below), whose sum is σ = 36069880. Its totient is φ = 10237536.

The previous prime is 20543197. The next prime is 20543221. The reversal of 20543212 is 21234502.

It is a self number, because there is not a number n which added to its sum of digits gives 20543212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7137 + ... + 9592.

Almost surely, 2^20543212 is an apocalyptic number.

It is an amenable number.

20543212 is a deficient number, since it is larger than the sum of its proper divisors (15526668).

20543212 is a wasteful number, since it uses less digits than its factorization.

20543212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17040 (or 17038 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20543212 is about 4532.4620241101. The cubic root of 20543212 is about 273.8773493364.

Adding to 20543212 its reverse (21234502), we get a palindrome (41777714).

The spelling of 20543212 in words is "twenty million, five hundred forty-three thousand, two hundred twelve".