20638063049 has 2 divisors, whose sum is σ = 20638063050. Its totient is φ = 20638063048.

The previous prime is 20638062989. The next prime is 20638063057. The reversal of 20638063049 is 94036083602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15756525625 + 4881537424 = 125525^2 + 69868^2 .

It is a cyclic number.

It is not a de Polignac number, because 20638063049 - 2²⁴ = 20621285833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20638062997 and 20638063015.

It is not a weakly prime, because it can be changed into another prime (20638063079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10319031524 + 10319031525.

It is an arithmetic number, because the mean of its divisors is an integer number (10319031525).

Almost surely, 2^20638063049 is an apocalyptic number.

It is an amenable number.

20638063049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20638063049 is an equidigital number, since it uses as much as digits as its factorization.

20638063049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 20638063049 in words is "twenty billion, six hundred thirty-eight million, sixty-three thousand, forty-nine".