20830080 has 128 divisors (see below), whose sum is σ = 70012800. Its totient is φ = 5253120.

The previous prime is 20830067. The next prime is 20830133. The reversal of 20830080 is 8003802.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36195 + ... + 36765.

It is an arithmetic number, because the mean of its divisors is an integer number (546975).

Almost surely, 2^20830080 is an apocalyptic number.

20830080 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 20830080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35006400).

20830080 is an abundant number, since it is smaller than the sum of its proper divisors (49182720).

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

20830080 is a wasteful number, since it uses less digits than its factorization.

20830080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20830080 is about 4563.9982471513. The cubic root of 20830080 is about 275.1462803023.

20830080 divided by its product of nonzero digits (384) gives a palindrome (54245).

Adding to 20830080 its reverse (8003802), we get a palindrome (28833882).

The spelling of 20830080 in words is "twenty million, eight hundred thirty thousand, eighty".