20798316 has 192 divisors, whose sum is σ = 69995520. Its totient is φ = 5184000.

The previous prime is 20798263. The next prime is 20798317. The reversal of 20798316 is 61389702.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20798317) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 340926 + ... + 340986.

It is an arithmetic number, because the mean of its divisors is an integer number (364560).

Almost surely, 2^20798316 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 20798316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34997760).

20798316 is an abundant number, since it is smaller than the sum of its proper divisors (49197204).

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

20798316 is a wasteful number, since it uses less digits than its factorization.

20798316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 20798316 is about 4560.5170759465. The cubic root of 20798316 is about 275.0063513685.

It can be divided in two parts, 2079 and 8316, that multiplied together give a square (17288964 = 4158²).

The spelling of 20798316 in words is "twenty million, seven hundred ninety-eight thousand, three hundred sixteen".