20782908 has 72 divisors (see below), whose sum is σ = 57592080. Its totient is φ = 6289920.

The previous prime is 20782877. The next prime is 20782919. The reversal of 20782908 is 80928702.

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 23 ways as a sum of consecutive naturals, for example, 17163 + ... + 18333.

It is an arithmetic number, because the mean of its divisors is an integer number (799890).

Almost surely, 2^20782908 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 20782908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28796040).

20782908 is an abundant number, since it is smaller than the sum of its proper divisors (36809172).

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

20782908 is a wasteful number, since it uses less digits than its factorization.

20782908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 20782908 is about 4558.8274808332. The cubic root of 20782908 is about 274.9384236788.

The spelling of 20782908 in words is "twenty million, seven hundred eighty-two thousand, nine hundred eight".