20807282 has 8 divisors (see below), whose sum is σ = 31231452. Its totient is φ = 10396800.

The previous prime is 20807273. The next prime is 20807287. The reversal of 20807282 is 28270802.

It can be written as a sum of positive squares in 2 ways, for example, as 20784481 + 22801 = 4559^2 + 151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20807287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2282 + ... + 6842.

Almost surely, 2^20807282 is an apocalyptic number.

It is a pronic number, being equal to 4561×4562.

20807282 is a deficient number, since it is larger than the sum of its proper divisors (10424170).

20807282 is a wasteful number, since it uses less digits than its factorization.

20807282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 20807282 is about 4561.4999725967. The cubic root of 20807282 is about 275.0458634250.

The spelling of 20807282 in words is "twenty million, eight hundred seven thousand, two hundred eighty-two".