20283844 has 36 divisors (see below), whose sum is σ = 42423276. Its totient is φ = 8455104.

The previous prime is 20283841. The next prime is 20283863. The reversal of 20283844 is 44838202.

It can be written as a sum of positive squares in 2 ways, for example, as 16711744 + 3572100 = 4088^2 + 1890^2 .

It is a super-2 number, since 2×20283844² = 822868654832672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20283841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5854 + ... + 8650.

Almost surely, 2^20283844 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 20283844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21211638).

20283844 is an abundant number, since it is smaller than the sum of its proper divisors (22139432).

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

20283844 is a wasteful number, since it uses less digits than its factorization.

20283844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852 (or 2843 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 20283844 is about 4503.7588745402. The cubic root of 20283844 is about 272.7198528756.

The spelling of 20283844 in words is "twenty million, two hundred eighty-three thousand, eight hundred forty-four".