20248988563 has 2 divisors, whose sum is σ = 20248988564. Its totient is φ = 20248988562.

The previous prime is 20248988537. The next prime is 20248988581. The reversal of 20248988563 is 36588984202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20248988563 - 2¹⁷ = 20248857491 is a prime.

It is not a weakly prime, because it can be changed into another prime (20248988593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10124494281 + 10124494282.

It is an arithmetic number, because the mean of its divisors is an integer number (10124494282).

Almost surely, 2^20248988563 is an apocalyptic number.

20248988563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20248988563 is an equidigital number, since it uses as much as digits as its factorization.

20248988563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 20248988563 in words is "twenty billion, two hundred forty-eight million, nine hundred eighty-eight thousand, five hundred sixty-three".