20284360 has 16 divisors (see below), whose sum is σ = 45639900. Its totient is φ = 8113728.

The previous prime is 20284339. The next prime is 20284373. The reversal of 20284360 is 6348202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16434916 + 3849444 = 4054^2 + 1962^2 .

It is a super-2 number, since 2×20284360² = 822910521219200, which contains 22 as substring.

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, 253515 + ... + 253594.

Almost surely, 2^20284360 is an apocalyptic number.

20284360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20284360 is an abundant number, since it is smaller than the sum of its proper divisors (25355540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20284360 is a wasteful number, since it uses less digits than its factorization.

20284360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507120 (or 507116 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20284360 is about 4503.8161596584. The cubic root of 20284360 is about 272.7221654262.

The spelling of 20284360 in words is "twenty million, two hundred eighty-four thousand, three hundred sixty".