20284445 has 8 divisors (see below), whose sum is σ = 24383160. Its totient is φ = 16199680.

The previous prime is 20284441. The next prime is 20284469. The reversal of 20284445 is 54448202.

It can be written as a sum of positive squares in 4 ways, for example, as 8305924 + 11978521 = 2882^2 + 3461^2 .

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

It is not a de Polignac number, because 20284445 - 2² = 20284441 is a prime.

It is a super-2 number, since 2×20284445² = 822917417916050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284441) 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 7 ways as a sum of consecutive naturals, for example, 41 + ... + 6369.

It is an arithmetic number, because the mean of its divisors is an integer number (3047895).

Almost surely, 2^20284445 is an apocalyptic number.

It is an amenable number.

20284445 is a deficient number, since it is larger than the sum of its proper divisors (4098715).

20284445 is an equidigital number, since it uses as much as digits as its factorization.

20284445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6975.

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 20284445 is about 4503.8255960905. The cubic root of 20284445 is about 272.7225463659.

The spelling of 20284445 in words is "twenty million, two hundred eighty-four thousand, four hundred forty-five".