20969170 has 16 divisors (see below), whose sum is σ = 38035008. Its totient is φ = 8323120.

The previous prime is 20969159. The next prime is 20969173. The reversal of 20969170 is 7196902.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (20969173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6694 + ... + 9313.

It is an arithmetic number, because the mean of its divisors is an integer number (2377188).

Almost surely, 2^20969170 is an apocalyptic number.

20969170 is a deficient number, since it is larger than the sum of its proper divisors (17065838).

20969170 is a wasteful number, since it uses less digits than its factorization.

20969170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16145.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 20969170 is about 4579.2106306655. The cubic root of 20969170 is about 275.7573393991.

The spelling of 20969170 in words is "twenty million, nine hundred sixty-nine thousand, one hundred seventy".