20446161 has 8 divisors (see below), whose sum is σ = 27283584. Its totient is φ = 13619760.

The previous prime is 20446157. The next prime is 20446177. The reversal of 20446161 is 16164402.

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

It is not a de Polignac number, because 20446161 - 2² = 20446157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20446141) 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, 3816 + ... + 7446.

It is an arithmetic number, because the mean of its divisors is an integer number (3410448).

Almost surely, 2^20446161 is an apocalyptic number.

It is an amenable number.

20446161 is a deficient number, since it is larger than the sum of its proper divisors (6837423).

20446161 is a wasteful number, since it uses less digits than its factorization.

20446161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20446161 is about 4521.7431373310. The cubic root of 20446161 is about 273.4453812215.

The spelling of 20446161 in words is "twenty million, four hundred forty-six thousand, one hundred sixty-one".