20462171 has 4 divisors (see below), whose sum is σ = 20490600. Its totient is φ = 20433744.

The previous prime is 20462149. The next prime is 20462179. The reversal of 20462171 is 17126402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20462171 - 2¹⁸ = 20200027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20462179) 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, 13106 + ... + 14583.

It is an arithmetic number, because the mean of its divisors is an integer number (5122650).

Almost surely, 2^20462171 is an apocalyptic number.

20462171 is a deficient number, since it is larger than the sum of its proper divisors (28429).

20462171 is an equidigital number, since it uses as much as digits as its factorization.

20462171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28428.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20462171 is about 4523.5131258790. The cubic root of 20462171 is about 273.5167347694.

Adding to 20462171 its reverse (17126402), we get a palindrome (37588573).

The spelling of 20462171 in words is "twenty million, four hundred sixty-two thousand, one hundred seventy-one".