20849170 has 8 divisors (see below), whose sum is σ = 37528524. Its totient is φ = 8339664.

The previous prime is 20849161. The next prime is 20849177. The reversal of 20849170 is 7194802.

It can be written as a sum of positive squares in 2 ways, for example, as 19989841 + 859329 = 4471^2 + 927^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20849177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042449 + ... + 1042468.

Almost surely, 2^20849170 is an apocalyptic number.

20849170 is a deficient number, since it is larger than the sum of its proper divisors (16679354).

20849170 is a wasteful number, since it uses less digits than its factorization.

20849170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084924.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 20849170 is about 4566.0891362303. The cubic root of 20849170 is about 275.2303084436.

The spelling of 20849170 in words is "twenty million, eight hundred forty-nine thousand, one hundred seventy".