20411357 has 2 divisors, whose sum is σ = 20411358. Its totient is φ = 20411356.

The previous prime is 20411341. The next prime is 20411359. The reversal of 20411357 is 75311402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18757561 + 1653796 = 4331^2 + 1286^2 .

It is a cyclic number.

It is not a de Polignac number, because 20411357 - 2⁴ = 20411341 is a prime.

Together with 20411359, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1295015 and since 20411357 and 1295015 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20411359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205678 + 10205679.

It is an arithmetic number, because the mean of its divisors is an integer number (10205679).

Almost surely, 2^20411357 is an apocalyptic number.

It is an amenable number.

20411357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20411357 is an equidigital number, since it uses as much as digits as its factorization.

20411357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20411357 is about 4517.8929823536. The cubic root of 20411357 is about 273.2901377639.

Adding to 20411357 its reverse (75311402), we get a palindrome (95722759).

The spelling of 20411357 in words is "twenty million, four hundred eleven thousand, three hundred fifty-seven".