20102228 has 24 divisors (see below), whose sum is σ = 39211200. Its totient is φ = 8961408.

The previous prime is 20102227. The next prime is 20102233. The reversal of 20102228 is 82220102.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6488 + ... + 9071.

It is an arithmetic number, because the mean of its divisors is an integer number (1633800).

Almost surely, 2^20102228 is an apocalyptic number.

It is an amenable number.

20102228 is a deficient number, since it is larger than the sum of its proper divisors (19108972).

20102228 is a wasteful number, since it uses less digits than its factorization.

20102228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15599 (or 15597 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20102228 is about 4483.5508249601. The cubic root of 20102228 is about 271.9034583854.

The spelling of 20102228 in words is "twenty million, one hundred two thousand, two hundred twenty-eight".