20716080 has 320 divisors, whose sum is σ = 85708800. Its totient is φ = 4008960.

The previous prime is 20716079. The next prime is 20716097. The reversal of 20716080 is 8061702.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20716080.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 351091 + ... + 351149.

It is an arithmetic number, because the mean of its divisors is an integer number (267840).

Almost surely, 2^20716080 is an apocalyptic number.

20716080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20716080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42854400).

20716080 is an abundant number, since it is smaller than the sum of its proper divisors (64992720).

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

20716080 is a wasteful number, since it uses less digits than its factorization.

20716080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 20716080 is about 4551.4920630492. The cubic root of 20716080 is about 274.6434166179.

Adding to 20716080 its reverse (8061702), we get a palindrome (28777782).

The spelling of 20716080 in words is "twenty million, seven hundred sixteen thousand, eighty".