21870575024 has 20 divisors (see below), whose sum is σ = 44604462840. Its totient is φ = 10359745920.

The previous prime is 21870575003. The next prime is 21870575039. The reversal of 21870575024 is 42057507812.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 35971037 + ... + 35971644.

It is an arithmetic number, because the mean of its divisors is an integer number (2230223142).

Almost surely, 2^21870575024 is an apocalyptic number.

It is an amenable number.

21870575024 is an abundant number, since it is smaller than the sum of its proper divisors (22733887816).

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

21870575024 is a wasteful number, since it uses less digits than its factorization.

21870575024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71942708 (or 71942702 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 41.

The spelling of 21870575024 in words is "twenty-one billion, eight hundred seventy million, five hundred seventy-five thousand, twenty-four".