21242445303 has 16 divisors (see below), whose sum is σ = 30014064000. Its totient is φ = 13326233760.

The previous prime is 21242445293. The next prime is 21242445337. The reversal of 21242445303 is 30354424212.

It is not a de Polignac number, because 21242445303 - 2¹⁷ = 21242314231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242445383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242093 + ... + 1259078.

It is an arithmetic number, because the mean of its divisors is an integer number (1875879000).

Almost surely, 2^21242445303 is an apocalyptic number.

21242445303 is a deficient number, since it is larger than the sum of its proper divisors (8771618697).

21242445303 is a wasteful number, since it uses less digits than its factorization.

21242445303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501342.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 21242445303 its reverse (30354424212), we get a palindrome (51596869515).

The spelling of 21242445303 in words is "twenty-one billion, two hundred forty-two million, four hundred forty-five thousand, three hundred three".