20284264 has 128 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 6819840.

The previous prime is 20284249. The next prime is 20284273. The reversal of 20284264 is 46248202.

It is a super-2 number, since 2×20284264² = 822902732043392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 31 ways as a sum of consecutive naturals, for example, 136062 + ... + 136210.

It is an arithmetic number, because the mean of its divisors is an integer number (425250).

Almost surely, 2^20284264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20284264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27216000).

20284264 is an abundant number, since it is smaller than the sum of its proper divisors (34147736).

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

20284264 is a wasteful number, since it uses less digits than its factorization.

20284264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 20284264 is about 4503.8055020172. The cubic root of 20284264 is about 272.7217351872.

The spelling of 20284264 in words is "twenty million, two hundred eighty-four thousand, two hundred sixty-four".