20340288 has 112 divisors (see below), whose sum is σ = 60960000. Its totient is φ = 6649344.

The previous prime is 20340283. The next prime is 20340301. The reversal of 20340288 is 88204302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20340283) 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 15 ways as a sum of consecutive naturals, for example, 136438 + ... + 136586.

Almost surely, 2^20340288 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 20340288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30480000).

20340288 is an abundant number, since it is smaller than the sum of its proper divisors (40619712).

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

20340288 is a wasteful number, since it uses less digits than its factorization.

20340288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20340288 is about 4510.0208425239. The cubic root of 20340288 is about 272.9725850988.

The spelling of 20340288 in words is "twenty million, three hundred forty thousand, two hundred eighty-eight".