21073580503 has 16 divisors (see below), whose sum is σ = 21559910400. Its totient is φ = 20593359360.

The previous prime is 21073580497. The next prime is 21073580543. The reversal of 21073580503 is 30508537012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21073580503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073580543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3781303 + ... + 3786871.

It is an arithmetic number, because the mean of its divisors is an integer number (1347494400).

Almost surely, 2^21073580503 is an apocalyptic number.

21073580503 is a deficient number, since it is larger than the sum of its proper divisors (486329897).

21073580503 is a wasteful number, since it uses less digits than its factorization.

21073580503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6102.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 21073580503 in words is "twenty-one billion, seventy-three million, five hundred eighty thousand, five hundred three".