20528212 has 6 divisors (see below), whose sum is σ = 35924378. Its totient is φ = 10264104.

The previous prime is 20528203. The next prime is 20528251. The reversal of 20528212 is 21282502.

It can be written as a sum of positive squares in only one way, i.e., 20394256 + 133956 = 4516^2 + 366^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2566023 + ... + 2566030.

Almost surely, 2^20528212 is an apocalyptic number.

It is an amenable number.

20528212 is a deficient number, since it is larger than the sum of its proper divisors (15396166).

20528212 is a wasteful number, since it uses less digits than its factorization.

20528212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5132057 (or 5132055 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20528212 is about 4530.8069921373. The cubic root of 20528212 is about 273.8106742626.

The spelling of 20528212 in words is "twenty million, five hundred twenty-eight thousand, two hundred twelve".