20418353 has 2 divisors, whose sum is σ = 20418354. Its totient is φ = 20418352.

The previous prime is 20418341. The next prime is 20418361. The reversal of 20418353 is 35381402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13490929 + 6927424 = 3673^2 + 2632^2 .

It is a cyclic number.

It is not a de Polignac number, because 20418353 - 2⁴ = 20418337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20418373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10209176 + 10209177.

It is an arithmetic number, because the mean of its divisors is an integer number (10209177).

Almost surely, 2^20418353 is an apocalyptic number.

It is an amenable number.

20418353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20418353 is an equidigital number, since it uses as much as digits as its factorization.

20418353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20418353 is about 4518.6671707485. The cubic root of 20418353 is about 273.3213576285.

Adding to 20418353 its reverse (35381402), we get a palindrome (55799755).

The spelling of 20418353 in words is "twenty million, four hundred eighteen thousand, three hundred fifty-three".