20841171 has 16 divisors (see below), whose sum is σ = 30132480. Its totient is φ = 12736800.

The previous prime is 20841113. The next prime is 20841179. The reversal of 20841171 is 17114802.

It is not a de Polignac number, because 20841171 - 2¹⁹ = 20316883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20841179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4120 + ... + 7658.

It is an arithmetic number, because the mean of its divisors is an integer number (1883280).

Almost surely, 2^20841171 is an apocalyptic number.

20841171 is a deficient number, since it is larger than the sum of its proper divisors (9291309).

20841171 is a wasteful number, since it uses less digits than its factorization.

20841171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3706.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 20841171 is about 4565.2131385073. The cubic root of 20841171 is about 275.1951056218.

Adding to 20841171 its reverse (17114802), we get a palindrome (37955973).

It can be divided in two parts, 20841 and 171, that added together give a palindrome (21012).

The spelling of 20841171 in words is "twenty million, eight hundred forty-one thousand, one hundred seventy-one".