20752849 has 4 divisors (see below), whose sum is σ = 22349236. Its totient is φ = 19156464.

The previous prime is 20752843. The next prime is 20752873. The reversal of 20752849 is 94825702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4592449 + 16160400 = 2143^2 + 4020^2 .

It is a cyclic number.

It is not a de Polignac number, because 20752849 - 2³ = 20752841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20752841) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 798174 + ... + 798199.

It is an arithmetic number, because the mean of its divisors is an integer number (5587309).

Almost surely, 2^20752849 is an apocalyptic number.

It is an amenable number.

20752849 is a deficient number, since it is larger than the sum of its proper divisors (1596387).

20752849 is a wasteful number, since it uses less digits than its factorization.

20752849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596386.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 20752849 is about 4555.5294972154. The cubic root of 20752849 is about 274.8058089099.

The spelling of 20752849 in words is "twenty million, seven hundred fifty-two thousand, eight hundred forty-nine".