20532228 has 12 divisors (see below), whose sum is σ = 47908560. Its totient is φ = 6844072.

The previous prime is 20532227. The next prime is 20532233. The reversal of 20532228 is 82223502.

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 = 20532198 and 20532207.

It is not an unprimeable number, because it can be changed into a prime (20532227) 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, 855498 + ... + 855521.

It is an arithmetic number, because the mean of its divisors is an integer number (3992380).

Almost surely, 2^20532228 is an apocalyptic number.

It is an amenable number.

20532228 is an abundant number, since it is smaller than the sum of its proper divisors (27376332).

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

20532228 is a wasteful number, since it uses less digits than its factorization.

20532228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711026 (or 1711024 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20532228 is about 4531.2501586207. The cubic root of 20532228 is about 273.8285285854.

The spelling of 20532228 in words is "twenty million, five hundred thirty-two thousand, two hundred twenty-eight".