20525170 has 8 divisors (see below), whose sum is σ = 36945324. Its totient is φ = 8210064.

The previous prime is 20525159. The next prime is 20525189. The reversal of 20525170 is 7152502.

It can be written as a sum of positive squares in 2 ways, for example, as 18584721 + 1940449 = 4311^2 + 1393^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 1026249 + ... + 1026268.

Almost surely, 2^20525170 is an apocalyptic number.

20525170 is a deficient number, since it is larger than the sum of its proper divisors (16420154).

20525170 is a wasteful number, since it uses less digits than its factorization.

20525170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052524.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 20525170 is about 4530.4712779136. The cubic root of 20525170 is about 273.7971485966.

Adding to 20525170 its reverse (7152502), we get a palindrome (27677672).

The spelling of 20525170 in words is "twenty million, five hundred twenty-five thousand, one hundred seventy".