20532245 has 8 divisors (see below), whose sum is σ = 24710616. Its totient is φ = 16377856.

The previous prime is 20532233. The next prime is 20532263. The reversal of 20532245 is 54223502.

It can be written as a sum of positive squares in 4 ways, for example, as 2630884 + 17901361 = 1622^2 + 4231^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20532245 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 20532245.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4052 + ... + 7581.

It is an arithmetic number, because the mean of its divisors is an integer number (3088827).

Almost surely, 2^20532245 is an apocalyptic number.

It is an amenable number.

20532245 is a deficient number, since it is larger than the sum of its proper divisors (4178371).

20532245 is a wasteful number, since it uses less digits than its factorization.

20532245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11991.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20532245 is about 4531.2520344823. The cubic root of 20532245 is about 273.8286041590.

Adding to 20532245 its reverse (54223502), we get a palindrome (74755747).

The spelling of 20532245 in words is "twenty million, five hundred thirty-two thousand, two hundred forty-five".