20735316 has 72 divisors (see below), whose sum is σ = 60540480. Its totient is φ = 5861376.

The previous prime is 20735293. The next prime is 20735321. The reversal of 20735316 is 61353702.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20735316.

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, 26580 + ... + 27348.

It is an arithmetic number, because the mean of its divisors is an integer number (840840).

Almost surely, 2^20735316 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 20735316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30270240).

20735316 is an abundant number, since it is smaller than the sum of its proper divisors (39805164).

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

20735316 is a wasteful number, since it uses less digits than its factorization.

20735316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20735316 is about 4553.6047259287. The cubic root of 20735316 is about 274.7283974059.

The spelling of 20735316 in words is "twenty million, seven hundred thirty-five thousand, three hundred sixteen".