20471373 has 20 divisors (see below), whose sum is σ = 32934748. Its totient is φ = 12597120.

The previous prime is 20471327. The next prime is 20471389. The reversal of 20471373 is 37317402.

It can be written as a sum of positive squares in 2 ways, for example, as 3849444 + 16621929 = 1962^2 + 4077^2 .

It is not a de Polignac number, because 20471373 - 2¹³ = 20463181 is a prime.

It is a super-2 number, since 2×20471373² = 838154225010258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473373) 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 19 ways as a sum of consecutive naturals, for example, 8668 + ... + 10773.

Almost surely, 2^20471373 is an apocalyptic number.

It is an amenable number.

20471373 is a deficient number, since it is larger than the sum of its proper divisors (12463375).

20471373 is a wasteful number, since it uses less digits than its factorization.

20471373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19466 (or 19457 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20471373 is about 4524.5301413517. The cubic root of 20471373 is about 273.5577295038.

Adding to 20471373 its reverse (37317402), we get a palindrome (57788775).

The spelling of 20471373 in words is "twenty million, four hundred seventy-one thousand, three hundred seventy-three".