20237161 has 4 divisors (see below), whose sum is σ = 23128192. Its totient is φ = 17346132.

The previous prime is 20237159. The next prime is 20237167. The reversal of 20237161 is 16173202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20237161 - 2¹ = 20237159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20237167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445505 + ... + 1445518.

It is an arithmetic number, because the mean of its divisors is an integer number (5782048).

Almost surely, 2^20237161 is an apocalyptic number.

It is an amenable number.

20237161 is a deficient number, since it is larger than the sum of its proper divisors (2891031).

20237161 is an equidigital number, since it uses as much as digits as its factorization.

20237161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891030.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20237161 is about 4498.5732182549. The cubic root of 20237161 is about 272.5104717801.

The spelling of 20237161 in words is "twenty million, two hundred thirty-seven thousand, one hundred sixty-one".