21003588670 has 16 divisors (see below), whose sum is σ = 37824822720. Its totient is φ = 8397354784.

The previous prime is 21003588659. The next prime is 21003588677. The reversal of 21003588670 is 7688530012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003588677) 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 in 7 ways as a sum of consecutive naturals, for example, 488425 + ... + 529684.

It is an arithmetic number, because the mean of its divisors is an integer number (2364051420).

Almost surely, 2^21003588670 is an apocalyptic number.

21003588670 is a deficient number, since it is larger than the sum of its proper divisors (16821234050).

21003588670 is a wasteful number, since it uses less digits than its factorization.

21003588670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020179.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 21003588670 in words is "twenty-one billion, three million, five hundred eighty-eight thousand, six hundred seventy".