20200161 has 8 divisors (see below), whose sum is σ = 26958400. Its totient is φ = 13454352.

The previous prime is 20200157. The next prime is 20200171. The reversal of 20200161 is 16100202.

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

It is not a de Polignac number, because 20200161 - 2² = 20200157 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 (20200111) 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, 1791 + ... + 6603.

It is an arithmetic number, because the mean of its divisors is an integer number (3369800).

Almost surely, 2^20200161 is an apocalyptic number.

It is an amenable number.

20200161 is a deficient number, since it is larger than the sum of its proper divisors (6758239).

20200161 is a wasteful number, since it uses less digits than its factorization.

20200161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20200161 is about 4494.4589218281. The cubic root of 20200161 is about 272.3442917080.

Adding to 20200161 its reverse (16100202), we get a palindrome (36300363).

The spelling of 20200161 in words is "twenty million, two hundred thousand, one hundred sixty-one".