20284760 has 16 divisors (see below), whose sum is σ = 45640800. Its totient is φ = 8113888.

The previous prime is 20284741. The next prime is 20284763. The reversal of 20284760 is 6748202.

It is a super-2 number, since 2×20284760² = 822942976515200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284763) 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 3 ways as a sum of consecutive naturals, for example, 253520 + ... + 253599.

It is an arithmetic number, because the mean of its divisors is an integer number (2852550).

Almost surely, 2^20284760 is an apocalyptic number.

20284760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20284760 is an abundant number, since it is smaller than the sum of its proper divisors (25356040).

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

20284760 is a wasteful number, since it uses less digits than its factorization.

20284760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507130 (or 507126 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 20284760 is about 4503.8605662254. The cubic root of 20284760 is about 272.7239580742.

The spelling of 20284760 in words is "twenty million, two hundred eighty-four thousand, seven hundred sixty".