20868084 has 96 divisors (see below), whose sum is σ = 58490880. Its totient is φ = 6415200.

The previous prime is 20868079. The next prime is 20868091. The reversal of 20868084 is 48086802.

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 31 ways as a sum of consecutive naturals, for example, 76869 + ... + 77139.

It is an arithmetic number, because the mean of its divisors is an integer number (609280).

Almost surely, 2^20868084 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 20868084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29245440).

20868084 is an abundant number, since it is smaller than the sum of its proper divisors (37622796).

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

20868084 is a wasteful number, since it uses less digits than its factorization.

20868084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 330 counting only the distinct ones).

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

The square root of 20868084 is about 4568.1598045603. The cubic root of 20868084 is about 275.3135113189.

The spelling of 20868084 in words is "twenty million, eight hundred sixty-eight thousand, eighty-four".