20554624757 has 2 divisors, whose sum is σ = 20554624758. Its totient is φ = 20554624756.

The previous prime is 20554624733. The next prime is 20554624759. The reversal of 20554624757 is 75742645502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20281747396 + 272877361 = 142414^2 + 16519^2 .

It is a cyclic number.

It is not a de Polignac number, because 20554624757 - 2⁶ = 20554624693 is a prime.

Together with 20554624759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20554624759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277312378 + 10277312379.

It is an arithmetic number, because the mean of its divisors is an integer number (10277312379).

Almost surely, 2^20554624757 is an apocalyptic number.

It is an amenable number.

20554624757 is a deficient number, since it is larger than the sum of its proper divisors (1).

20554624757 is an equidigital number, since it uses as much as digits as its factorization.

20554624757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352000, while the sum is 47.

The spelling of 20554624757 in words is "twenty billion, five hundred fifty-four million, six hundred twenty-four thousand, seven hundred fifty-seven".