20530212 has 12 divisors (see below), whose sum is σ = 47903856. Its totient is φ = 6843400.

The previous prime is 20530201. The next prime is 20530219. The reversal of 20530212 is 21203502.

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 = 20530191 and 20530200.

It is not an unprimeable number, because it can be changed into a prime (20530219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 855414 + ... + 855437.

It is an arithmetic number, because the mean of its divisors is an integer number (3991988).

Almost surely, 2^20530212 is an apocalyptic number.

It is an amenable number.

20530212 is an abundant number, since it is smaller than the sum of its proper divisors (27373644).

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

20530212 is a wasteful number, since it uses less digits than its factorization.

20530212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710858 (or 1710856 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20530212 is about 4531.0276979952. The cubic root of 20530212 is about 273.8195661487.

Adding to 20530212 its reverse (21203502), we get a palindrome (41733714).

The spelling of 20530212 in words is "twenty million, five hundred thirty thousand, two hundred twelve".