20871195 has 8 divisors (see below), whose sum is σ = 33393936. Its totient is φ = 11131296.

The previous prime is 20871187. The next prime is 20871197. The reversal of 20871195 is 59117802.

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

It is not a de Polignac number, because 20871195 - 2³ = 20871187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20871197) 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, 695692 + ... + 695721.

It is an arithmetic number, because the mean of its divisors is an integer number (4174242).

Almost surely, 2^20871195 is an apocalyptic number.

20871195 is a deficient number, since it is larger than the sum of its proper divisors (12522741).

20871195 is a wasteful number, since it uses less digits than its factorization.

20871195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391421.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 20871195 is about 4568.5003009741. The cubic root of 20871195 is about 275.3271918238.

Adding to 20871195 its reverse (59117802), we get a palindrome (79988997).

The spelling of 20871195 in words is "twenty million, eight hundred seventy-one thousand, one hundred ninety-five".