20112288 has 72 divisors (see below), whose sum is σ = 60687648. Its totient is φ = 5713152.

The previous prime is 20112277. The next prime is 20112319. The reversal of 20112288 is 88221102.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 11 ways as a sum of consecutive naturals, for example, 116170 + ... + 116342.

It is an arithmetic number, because the mean of its divisors is an integer number (842884).

Almost surely, 2^20112288 is an apocalyptic number.

20112288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30343824).

20112288 is an abundant number, since it is smaller than the sum of its proper divisors (40575360).

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

20112288 is an equidigital number, since it uses as much as digits as its factorization.

20112288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 20112288 is about 4484.6725632982. The cubic root of 20112288 is about 271.9488081284.

The spelling of 20112288 in words is "twenty million, one hundred twelve thousand, two hundred eighty-eight".