20875049 has 12 divisors (see below), whose sum is σ = 22783500. Its totient is φ = 19116864.

The previous prime is 20875033. The next prime is 20875051. The reversal of 20875049 is 94057802.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6091024 + 14784025 = 2468^2 + 3845^2 .

It is not a de Polignac number, because 20875049 - 2⁴ = 20875033 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875009) 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 11 ways as a sum of consecutive naturals, for example, 24767 + ... + 25595.

It is an arithmetic number, because the mean of its divisors is an integer number (1898625).

Almost surely, 2^20875049 is an apocalyptic number.

It is an amenable number.

20875049 is a deficient number, since it is larger than the sum of its proper divisors (1908451).

20875049 is a wasteful number, since it uses less digits than its factorization.

20875049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20875049 is about 4568.9220829425. The cubic root of 20875049 is about 275.3441377580.

It can be divided in two parts, 208 and 75049, that added together give a palindrome (75257).

The spelling of 20875049 in words is "twenty million, eight hundred seventy-five thousand, forty-nine".