20107471 has 4 divisors (see below), whose sum is σ = 20218744. Its totient is φ = 19996200.

The previous prime is 20107463. The next prime is 20107519. The reversal of 20107471 is 17470102.

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 20107471 - 2³ = 20107463 is a prime.

It is a super-3 number, since 3×20107471³ (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 (20107441) 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, 55365 + ... + 55726.

It is an arithmetic number, because the mean of its divisors is an integer number (5054686).

Almost surely, 2^20107471 is an apocalyptic number.

20107471 is a deficient number, since it is larger than the sum of its proper divisors (111273).

20107471 is a wasteful number, since it uses less digits than its factorization.

20107471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111272.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 20107471 is about 4484.1354796661. The cubic root of 20107471 is about 271.9270953327.

Adding to 20107471 its reverse (17470102), we get a palindrome (37577573).

The spelling of 20107471 in words is "twenty million, one hundred seven thousand, four hundred seventy-one".