21135403450624 has 72 divisors (see below), whose sum is σ = 44585610360480. Its totient is φ = 9971619840000.

The previous prime is 21135403450613. The next prime is 21135403450663. The reversal of 21135403450624 is 42605430453112.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7435057 + ... + 9876784.

It is an arithmetic number, because the mean of its divisors is an integer number (619244588340).

Almost surely, 2^{21135403450624} is an apocalyptic number.

It is an amenable number.

21135403450624 is an abundant number, since it is smaller than the sum of its proper divisors (23450206909856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21135403450624 is a wasteful number, since it uses less digits than its factorization.

21135403450624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17312127 (or 17312113 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 21135403450624 in words is "twenty-one trillion, one hundred thirty-five billion, four hundred three million, four hundred fifty thousand, six hundred twenty-four".