20552228 has 12 divisors (see below), whose sum is σ = 36473472. Its totient is φ = 10131240.

The previous prime is 20552177. The next prime is 20552249. The reversal of 20552228 is 82225502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20552197 and 20552206.

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, 35900 + ... + 36467.

It is an arithmetic number, because the mean of its divisors is an integer number (3039456).

Almost surely, 2^20552228 is an apocalyptic number.

It is an amenable number.

20552228 is a deficient number, since it is larger than the sum of its proper divisors (15921244).

20552228 is a wasteful number, since it uses less digits than its factorization.

20552228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72442 (or 72440 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 20552228 is about 4533.4565179342. The cubic root of 20552228 is about 273.9174098851.

The spelling of 20552228 in words is "twenty million, five hundred fifty-two thousand, two hundred twenty-eight".