20162471 has 6 divisors (see below), whose sum is σ = 23454360. Its totient is φ = 17282076.

The previous prime is 20162449. The next prime is 20162489. The reversal of 20162471 is 17426102.

It is not a de Polignac number, because 20162471 - 2²² = 15968167 is a prime.

It is a super-3 number, since 3×20162471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20162071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 205691 + ... + 205788.

It is an arithmetic number, because the mean of its divisors is an integer number (3909060).

Almost surely, 2^20162471 is an apocalyptic number.

20162471 is a deficient number, since it is larger than the sum of its proper divisors (3291889).

20162471 is an equidigital number, since it uses as much as digits as its factorization.

20162471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411493 (or 411486 counting only the distinct ones).

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

The square root of 20162471 is about 4490.2640234178. The cubic root of 20162471 is about 272.1748038344.

Adding to 20162471 its reverse (17426102), we get a palindrome (37588573).

The spelling of 20162471 in words is "twenty million, one hundred sixty-two thousand, four hundred seventy-one".