20284312 has 16 divisors (see below), whose sum is σ = 38085840. Its totient is φ = 10128096.

The previous prime is 20284301. The next prime is 20284331. The reversal of 20284312 is 21348202.

It is a super-2 number, since 2×20284312² = 822906626626688, which contains 22 as substring.

It is a congruent number.

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, 6853 + ... + 9355.

It is an arithmetic number, because the mean of its divisors is an integer number (2380365).

Almost surely, 2^20284312 is an apocalyptic number.

It is an amenable number.

20284312 is a deficient number, since it is larger than the sum of its proper divisors (17801528).

20284312 is a wasteful number, since it uses less digits than its factorization.

20284312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20284312 is about 4503.8108308409. The cubic root of 20284312 is about 272.7219503069.

The spelling of 20284312 in words is "twenty million, two hundred eighty-four thousand, three hundred twelve".