20966156 has 12 divisors (see below), whose sum is σ = 38286192. Its totient is φ = 10027248.

The previous prime is 20966147. The next prime is 20966167. The reversal of 20966156 is 65166902.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113855 + ... + 114038.

It is an arithmetic number, because the mean of its divisors is an integer number (3190516).

Almost surely, 2^20966156 is an apocalyptic number.

It is an amenable number.

20966156 is a deficient number, since it is larger than the sum of its proper divisors (17320036).

20966156 is a wasteful number, since it uses less digits than its factorization.

20966156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227920 (or 227918 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 20966156 is about 4578.8815228176. The cubic root of 20966156 is about 275.7441267883.

The spelling of 20966156 in words is "twenty million, nine hundred sixty-six thousand, one hundred fifty-six".