20698241 has 2 divisors, whose sum is σ = 20698242. Its totient is φ = 20698240.

The previous prime is 20698219. The next prime is 20698253. The reversal of 20698241 is 14289602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14592400 + 6105841 = 3820^2 + 2471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20698241 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20698198 and 20698207.

It is not a weakly prime, because it can be changed into another prime (20698211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10349120 + 10349121.

It is an arithmetic number, because the mean of its divisors is an integer number (10349121).

Almost surely, 2^20698241 is an apocalyptic number.

It is an amenable number.

20698241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20698241 is an equidigital number, since it uses as much as digits as its factorization.

20698241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 20698241 is about 4549.5319539487. The cubic root of 20698241 is about 274.5645604686.

The spelling of 20698241 in words is "twenty million, six hundred ninety-eight thousand, two hundred forty-one".