20049161 has 8 divisors (see below), whose sum is σ = 23023200. Its totient is φ = 17267040.

The previous prime is 20049151. The next prime is 20049167. The reversal of 20049161 is 16194002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20049161 - 2¹⁰ = 20048137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20049167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47756 + ... + 48173.

It is an arithmetic number, because the mean of its divisors is an integer number (2877900).

Almost surely, 2^20049161 is an apocalyptic number.

It is an amenable number.

20049161 is a deficient number, since it is larger than the sum of its proper divisors (2974039).

20049161 is a wasteful number, since it uses less digits than its factorization.

20049161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95959.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20049161 is about 4477.6289484503. The cubic root of 20049161 is about 271.6639854871.

The spelling of 20049161 in words is "twenty million, forty-nine thousand, one hundred sixty-one".