20700170 has 16 divisors (see below), whose sum is σ = 37312488. Its totient is φ = 8268480.

The previous prime is 20700143. The next prime is 20700181. The reversal of 20700170 is 7100702.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19509889 + 1190281 = 4417^2 + 1091^2 .

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 7 ways as a sum of consecutive naturals, for example, 11960 + ... + 13580.

Almost surely, 2^20700170 is an apocalyptic number.

20700170 is a deficient number, since it is larger than the sum of its proper divisors (16612318).

20700170 is a wasteful number, since it uses less digits than its factorization.

20700170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905.

The product of its (nonzero) digits is 98, while the sum is 17.

The square root of 20700170 is about 4549.7439488393. The cubic root of 20700170 is about 274.5730896730.

Adding to 20700170 its reverse (7100702), we get a palindrome (27800872).

The spelling of 20700170 in words is "twenty million, seven hundred thousand, one hundred seventy".