21579142570 has 48 divisors (see below), whose sum is σ = 40898198880. Its totient is φ = 8196689952.

The previous prime is 21579142567. The next prime is 21579142603. The reversal of 21579142570 is 7524197512.

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 23 ways as a sum of consecutive naturals, for example, 720637 + ... + 749983.

It is an arithmetic number, because the mean of its divisors is an integer number (852045810).

Almost surely, 2^21579142570 is an apocalyptic number.

21579142570 is a deficient number, since it is larger than the sum of its proper divisors (19319056310).

21579142570 is a wasteful number, since it uses less digits than its factorization.

21579142570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29539 (or 29516 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 21579142570 in words is "twenty-one billion, five hundred seventy-nine million, one hundred forty-two thousand, five hundred seventy".