20268288 has 108 divisors (see below), whose sum is σ = 61647040. Its totient is φ = 6386688.

The previous prime is 20268271. The next prime is 20268293. The reversal of 20268288 is 88286202.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43545 + ... + 44007.

Almost surely, 2^20268288 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 20268288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30823520).

20268288 is an abundant number, since it is smaller than the sum of its proper divisors (41378752).

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

20268288 is a wasteful number, since it uses less digits than its factorization.

20268288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 20268288 is about 4502.0315414266. The cubic root of 20268288 is about 272.6501173261.

The spelling of 20268288 in words is "twenty million, two hundred sixty-eight thousand, two hundred eighty-eight".