20467228 has 12 divisors (see below), whose sum is σ = 35977032. Its totient is φ = 10188080.

The previous prime is 20467189. The next prime is 20467247. The reversal of 20467228 is 82276402.

It is a self number, because there is not a number n which added to its sum of digits gives 20467228.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10363 + ... + 12178.

It is an arithmetic number, because the mean of its divisors is an integer number (2998086).

Almost surely, 2^20467228 is an apocalyptic number.

It is an amenable number.

20467228 is a deficient number, since it is larger than the sum of its proper divisors (15509804).

20467228 is a wasteful number, since it uses less digits than its factorization.

20467228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22772 (or 22770 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20467228 is about 4524.0720595499. The cubic root of 20467228 is about 273.5392651288.

The spelling of 20467228 in words is "twenty million, four hundred sixty-seven thousand, two hundred twenty-eight".