21045420569512 has 64 divisors (see below), whose sum is σ = 40094455564800. Its totient is φ = 10354478883840.

The previous prime is 21045420569471. The next prime is 21045420569521. The reversal of 21045420569512 is 21596502454012.

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 15 ways as a sum of consecutive naturals, for example, 1270773712 + ... + 1270790272.

It is an arithmetic number, because the mean of its divisors is an integer number (626475868200).

Almost surely, 2^{21045420569512} is an apocalyptic number.

It is an amenable number.

21045420569512 is a deficient number, since it is larger than the sum of its proper divisors (19049034995288).

21045420569512 is a wasteful number, since it uses less digits than its factorization.

21045420569512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23306 (or 23302 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 21045420569512 in words is "twenty-one trillion, forty-five billion, four hundred twenty million, five hundred sixty-nine thousand, five hundred twelve".