21248571503 has 2 divisors, whose sum is σ = 21248571504. Its totient is φ = 21248571502.

The previous prime is 21248571499. The next prime is 21248571557. The reversal of 21248571503 is 30517584212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21248571503 - 2² = 21248571499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21248571593) 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, 10624285751 + 10624285752.

It is an arithmetic number, because the mean of its divisors is an integer number (10624285752).

Almost surely, 2^21248571503 is an apocalyptic number.

21248571503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21248571503 is an equidigital number, since it uses as much as digits as its factorization.

21248571503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 21248571503 in words is "twenty-one billion, two hundred forty-eight million, five hundred seventy-one thousand, five hundred three".