20115282 has 48 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 6013920.

The previous prime is 20115259. The next prime is 20115287. The reversal of 20115282 is 28251102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20115287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74644 + ... + 74912.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^20115282 is an apocalyptic number.

20115282 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20115282, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22407840).

20115282 is an abundant number, since it is smaller than the sum of its proper divisors (24700398).

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

20115282 is a wasteful number, since it uses less digits than its factorization.

20115282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 20115282 is about 4485.0063545105. The cubic root of 20115282 is about 271.9623019410.

Adding to 20115282 its reverse (28251102), we get a palindrome (48366384).

The spelling of 20115282 in words is "twenty million, one hundred fifteen thousand, two hundred eighty-two".