20170946 has 4 divisors (see below), whose sum is σ = 30256422. Its totient is φ = 10085472.

The previous prime is 20170933. The next prime is 20170949. The reversal of 20170946 is 64907102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 714025 = 4411^2 + 845^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20170949) by changing a digit.

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 as a sum of consecutive naturals, namely, 5042735 + ... + 5042738.

Almost surely, 2^20170946 is an apocalyptic number.

20170946 is a deficient number, since it is larger than the sum of its proper divisors (10085476).

20170946 is a wasteful number, since it uses less digits than its factorization.

20170946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10085475.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20170946 is about 4491.2076326975. The cubic root of 20170946 is about 272.2129333928.

The spelling of 20170946 in words is "twenty million, one hundred seventy thousand, nine hundred forty-six".