20412228 has 12 divisors (see below), whose sum is σ = 47628560. Its totient is φ = 6804072.

The previous prime is 20412221. The next prime is 20412233. The reversal of 20412228 is 82221402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20412221) 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, 850498 + ... + 850521.

Almost surely, 2^20412228 is an apocalyptic number.

It is an amenable number.

20412228 is an abundant number, since it is smaller than the sum of its proper divisors (27216332).

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

20412228 is a wasteful number, since it uses less digits than its factorization.

20412228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701026 (or 1701024 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 20412228 is about 4517.9893758175. The cubic root of 20412228 is about 273.2940250169.

The spelling of 20412228 in words is "twenty million, four hundred twelve thousand, two hundred twenty-eight".