20424511 has 2 divisors, whose sum is σ = 20424512. Its totient is φ = 20424510.

The previous prime is 20424493. The next prime is 20424517. The reversal of 20424511 is 11542402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20424511 - 2¹⁷ = 20293439 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424517) 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, 10212255 + 10212256.

It is an arithmetic number, because the mean of its divisors is an integer number (10212256).

Almost surely, 2^20424511 is an apocalyptic number.

20424511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424511 is an equidigital number, since it uses as much as digits as its factorization.

20424511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20424511 is about 4519.3485149964. The cubic root of 20424511 is about 273.3488319918.

Adding to 20424511 its reverse (11542402), we get a palindrome (31966913).

The spelling of 20424511 in words is "twenty million, four hundred twenty-four thousand, five hundred eleven".