20474217 has 6 divisors (see below), whose sum is σ = 29573882. Its totient is φ = 13649472.

The previous prime is 20474161. The next prime is 20474221. The reversal of 20474217 is 71247402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14017536 + 6456681 = 3744^2 + 2541^2 .

It is not a de Polignac number, because 20474217 - 2¹¹ = 20472169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20474257) 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, 1137448 + ... + 1137465.

Almost surely, 2^20474217 is an apocalyptic number.

It is an amenable number.

20474217 is a deficient number, since it is larger than the sum of its proper divisors (9099665).

20474217 is a wasteful number, since it uses less digits than its factorization.

20474217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274919 (or 2274916 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 20474217 is about 4524.8444172148. The cubic root of 20474217 is about 273.5703969844.

The spelling of 20474217 in words is "twenty million, four hundred seventy-four thousand, two hundred seventeen".