20112417 has 24 divisors (see below), whose sum is σ = 31437224. Its totient is φ = 12317184.

The previous prime is 20112413. The next prime is 20112439. The reversal of 20112417 is 71421102.

It can be written as a sum of positive squares in 4 ways, for example, as 77841 + 20034576 = 279^2 + 4476^2 .

It is not a de Polignac number, because 20112417 - 2² = 20112413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20112417.

It is not an unprimeable number, because it can be changed into a prime (20112413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46233 + ... + 46665.

Almost surely, 2^20112417 is an apocalyptic number.

It is an amenable number.

20112417 is a deficient number, since it is larger than the sum of its proper divisors (11324807).

20112417 is a wasteful number, since it uses less digits than its factorization.

20112417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 20112417 is about 4484.6869455961. The cubic root of 20112417 is about 271.9493895528.

Adding to 20112417 its reverse (71421102), we get a palindrome (91533519).

The spelling of 20112417 in words is "twenty million, one hundred twelve thousand, four hundred seventeen".