20759245 has 16 divisors (see below), whose sum is σ = 26922672. Its totient is φ = 15275520.

The previous prime is 20759231. The next prime is 20759251. The reversal of 20759245 is 54295702.

It can be written as a sum of positive squares in 8 ways, for example, as 9449476 + 11309769 = 3074^2 + 3363^2 .

It is not a de Polignac number, because 20759245 - 2¹⁵ = 20726477 is a prime.

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 20759245.

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, 33559 + ... + 34171.

It is an arithmetic number, because the mean of its divisors is an integer number (1682667).

Almost surely, 2^20759245 is an apocalyptic number.

It is an amenable number.

20759245 is a deficient number, since it is larger than the sum of its proper divisors (6163427).

20759245 is a wasteful number, since it uses less digits than its factorization.

20759245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 20759245 is about 4556.2314471502. The cubic root of 20759245 is about 274.8340376030.

The spelling of 20759245 in words is "twenty million, seven hundred fifty-nine thousand, two hundred forty-five".