20603224517 has 2 divisors, whose sum is σ = 20603224518. Its totient is φ = 20603224516.

The previous prime is 20603224501. The next prime is 20603224547. The reversal of 20603224517 is 71542230602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19712440801 + 890783716 = 140401^2 + 29846^2 .

It is a cyclic number.

It is not a de Polignac number, because 20603224517 - 2⁴ = 20603224501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20603224547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10301612258 + 10301612259.

It is an arithmetic number, because the mean of its divisors is an integer number (10301612259).

Almost surely, 2^20603224517 is an apocalyptic number.

It is an amenable number.

20603224517 is a deficient number, since it is larger than the sum of its proper divisors (1).

20603224517 is an equidigital number, since it uses as much as digits as its factorization.

20603224517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 20603224517 in words is "twenty billion, six hundred three million, two hundred twenty-four thousand, five hundred seventeen".