20546228 has 12 divisors (see below), whose sum is σ = 36312612. Its totient is φ = 10171200.

The previous prime is 20546221. The next prime is 20546231. The reversal of 20546228 is 82264502.

It can be written as a sum of positive squares in 2 ways, for example, as 10484644 + 10061584 = 3238^2 + 3172^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20546228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20546221) by changing a digit.

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, 25025 + ... + 25832.

It is an arithmetic number, because the mean of its divisors is an integer number (3026051).

Almost surely, 2^20546228 is an apocalyptic number.

It is an amenable number.

20546228 is a deficient number, since it is larger than the sum of its proper divisors (15766384).

20546228 is a wasteful number, since it uses less digits than its factorization.

20546228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50962 (or 50960 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 20546228 is about 4532.7947229055. The cubic root of 20546228 is about 273.8907515520.

The spelling of 20546228 in words is "twenty million, five hundred forty-six thousand, two hundred twenty-eight".