20424653 has 2 divisors, whose sum is σ = 20424654. Its totient is φ = 20424652.

The previous prime is 20424631. The next prime is 20424661. The reversal of 20424653 is 35642402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14845609 + 5579044 = 3853^2 + 2362^2 .

It is a cyclic number.

It is not a de Polignac number, because 20424653 - 2¹² = 20420557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20424353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212326 + 10212327.

It is an arithmetic number, because the mean of its divisors is an integer number (10212327).

Almost surely, 2^20424653 is an apocalyptic number.

It is an amenable number.

20424653 is a deficient number, since it is larger than the sum of its proper divisors (1).

20424653 is an equidigital number, since it uses as much as digits as its factorization.

20424653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 20424653 is about 4519.3642251981. The cubic root of 20424653 is about 273.3494654700.

The spelling of 20424653 in words is "twenty million, four hundred twenty-four thousand, six hundred fifty-three".