20812760 has 64 divisors (see below), whose sum is σ = 50181120. Its totient is φ = 7741440.

The previous prime is 20812751. The next prime is 20812793. The reversal of 20812760 is 6721802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86240 + ... + 86480.

It is an arithmetic number, because the mean of its divisors is an integer number (784080).

Almost surely, 2^20812760 is an apocalyptic number.

20812760 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 20812760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25090560).

20812760 is an abundant number, since it is smaller than the sum of its proper divisors (29368360).

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

20812760 is a wasteful number, since it uses less digits than its factorization.

20812760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20812760 is about 4562.1003934591. The cubic root of 20812760 is about 275.0699987099.

The spelling of 20812760 in words is "twenty million, eight hundred twelve thousand, seven hundred sixty".