20428282 has 8 divisors (see below), whose sum is σ = 35019936. Its totient is φ = 8754972.

The previous prime is 20428277. The next prime is 20428283. The reversal of 20428282 is 28282402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20428282.

It is not an unprimeable number, because it can be changed into a prime (20428283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729568 + ... + 729595.

It is an arithmetic number, because the mean of its divisors is an integer number (4377492).

Almost surely, 2^20428282 is an apocalyptic number.

20428282 is a deficient number, since it is larger than the sum of its proper divisors (14591654).

20428282 is a wasteful number, since it uses less digits than its factorization.

20428282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459172.

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 20428282 is about 4519.7657018921. The cubic root of 20428282 is about 273.3656538554.

The spelling of 20428282 in words is "twenty million, four hundred twenty-eight thousand, two hundred eighty-two".