20021282 has 8 divisors (see below), whose sum is σ = 30248400. Its totient is φ = 9938484.

The previous prime is 20021263. The next prime is 20021297. The reversal of 20021282 is 28212002.

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 20021282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35732 + ... + 36287.

It is an arithmetic number, because the mean of its divisors is an integer number (3781050).

Almost surely, 2^20021282 is an apocalyptic number.

20021282 is a deficient number, since it is larger than the sum of its proper divisors (10227118).

20021282 is a wasteful number, since it uses less digits than its factorization.

20021282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72160.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20021282 is about 4474.5147222911. The cubic root of 20021282 is about 271.5380079219.

Adding to 20021282 its reverse (28212002), we get a palindrome (48233284).

The spelling of 20021282 in words is "twenty million, twenty-one thousand, two hundred eighty-two".