20818341 has 12 divisors (see below), whose sum is σ = 30169932. Its totient is φ = 13833216.

The previous prime is 20818339. The next prime is 20818349. The reversal of 20818341 is 14381802.

It can be written as a sum of positive squares in 2 ways, for example, as 3629025 + 17189316 = 1905^2 + 4146^2 .

It is not a de Polignac number, because 20818341 - 2¹ = 20818339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20818349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 796 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (2514161).

Almost surely, 2^20818341 is an apocalyptic number.

It is an amenable number.

20818341 is a deficient number, since it is larger than the sum of its proper divisors (9351591).

20818341 is a wasteful number, since it uses less digits than its factorization.

20818341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7620 (or 7617 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20818341 is about 4562.7120224708. The cubic root of 20818341 is about 275.0945834432.

The spelling of 20818341 in words is "twenty million, eight hundred eighteen thousand, three hundred forty-one".