20580161 has 8 divisors (see below), whose sum is σ = 23566080. Its totient is φ = 17605728.

The previous prime is 20580127. The next prime is 20580163. The reversal of 20580161 is 16108502.

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

It is a de Polignac number, because none of the positive numbers 2^k-20580161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20580163) 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, 1400 + ... + 6566.

It is an arithmetic number, because the mean of its divisors is an integer number (2945760).

Almost surely, 2^20580161 is an apocalyptic number.

It is an amenable number.

20580161 is a deficient number, since it is larger than the sum of its proper divisors (2985919).

20580161 is an equidigital number, since it uses as much as digits as its factorization.

20580161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5743.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 20580161 is about 4536.5362337360. The cubic root of 20580161 is about 274.0414494987.

Adding to 20580161 its reverse (16108502), we get a palindrome (36688663).

The spelling of 20580161 in words is "twenty million, five hundred eighty thousand, one hundred sixty-one".