20807283 has 32 divisors (see below), whose sum is σ = 33172480. Its totient is φ = 11352960.

The previous prime is 20807273. The next prime is 20807287. The reversal of 20807283 is 38270802.

It is not a de Polignac number, because 20807283 - 2⁵ = 20807251 is a prime.

It is the 4562-nd Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20807283.

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

It is a nontrivial repunit in base 4561.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47178 + ... + 47616.

It is an arithmetic number, because the mean of its divisors is an integer number (1036640).

Almost surely, 2^20807283 is an apocalyptic number.

20807283 is a deficient number, since it is larger than the sum of its proper divisors (12365197).

20807283 is a wasteful number, since it uses less digits than its factorization.

20807283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20807283 is about 4561.5000822098. The cubic root of 20807283 is about 275.0458678313.

The spelling of 20807283 in words is "twenty million, eight hundred seven thousand, two hundred eighty-three".