20348217 has 6 divisors (see below), whose sum is σ = 29391882. Its totient is φ = 13565472.

The previous prime is 20348191. The next prime is 20348219. The reversal of 20348217 is 71284302.

It can be written as a sum of positive squares in only one way, i.e., 16088121 + 4260096 = 4011^2 + 2064^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20348217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20348219) 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, 1130448 + ... + 1130465.

It is an arithmetic number, because the mean of its divisors is an integer number (4898647).

Almost surely, 2^20348217 is an apocalyptic number.

It is an amenable number.

20348217 is a deficient number, since it is larger than the sum of its proper divisors (9043665).

20348217 is a wasteful number, since it uses less digits than its factorization.

20348217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260919 (or 2260916 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 20348217 is about 4510.8997993748. The cubic root of 20348217 is about 273.0080503201.

The spelling of 20348217 in words is "twenty million, three hundred forty-eight thousand, two hundred seventeen".