20849706 has 12 divisors (see below), whose sum is σ = 45174402. Its totient is φ = 6949896.

The previous prime is 20849681. The next prime is 20849713. The reversal of 20849706 is 60794802.

It can be written as a sum of positive squares in only one way, i.e., 20169081 + 680625 = 4491^2 + 825^2 .

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 5 ways as a sum of consecutive naturals, for example, 579141 + ... + 579176.

Almost surely, 2^20849706 is an apocalyptic number.

20849706 is an abundant number, since it is smaller than the sum of its proper divisors (24324696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20849706 is a wasteful number, since it uses less digits than its factorization.

20849706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158325 (or 1158322 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 20849706 is about 4566.1478294072. The cubic root of 20849706 is about 275.2326670057.

The spelling of 20849706 in words is "twenty million, eight hundred forty-nine thousand, seven hundred six".