20066228 has 24 divisors (see below), whose sum is σ = 43220352. Its totient is φ = 7938144.

The previous prime is 20066197. The next prime is 20066243. The reversal of 20066228 is 82266002.

It is a super-2 number, since 2×20066228² = 805307012295968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 20066197 and 20066206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27200 + ... + 27927.

It is an arithmetic number, because the mean of its divisors is an integer number (1800848).

Almost surely, 2^20066228 is an apocalyptic number.

20066228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20066228 is an abundant number, since it is smaller than the sum of its proper divisors (23154124).

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

20066228 is a wasteful number, since it uses less digits than its factorization.

20066228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55151 (or 55149 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20066228 is about 4479.5343508003. The cubic root of 20066228 is about 271.7410489654.

The spelling of 20066228 in words is "twenty million, sixty-six thousand, two hundred twenty-eight".