20914288 has 40 divisors (see below), whose sum is σ = 43189200. Its totient is φ = 9782784.

The previous prime is 20914279. The next prime is 20914319. The reversal of 20914288 is 88241902.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 26670 + ... + 27442.

It is an arithmetic number, because the mean of its divisors is an integer number (1079730).

Almost surely, 2^20914288 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 20914288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21594600).

20914288 is an abundant number, since it is smaller than the sum of its proper divisors (22274912).

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

20914288 is a wasteful number, since it uses less digits than its factorization.

20914288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 20914288 is about 4573.2141869805. The cubic root of 20914288 is about 275.5165519813.

The spelling of 20914288 in words is "twenty million, nine hundred fourteen thousand, two hundred eighty-eight".