21572126084 has 12 divisors (see below), whose sum is σ = 37753531200. Its totient is φ = 10785402888.

The previous prime is 21572126057. The next prime is 21572126099. The reversal of 21572126084 is 48062127512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87464 + ... + 225375.

It is an arithmetic number, because the mean of its divisors is an integer number (3146127600).

Almost surely, 2^21572126084 is an apocalyptic number.

It is an amenable number.

21572126084 is a deficient number, since it is larger than the sum of its proper divisors (16181405116).

21572126084 is a wasteful number, since it uses less digits than its factorization.

21572126084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330082 (or 330080 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 21572126084 in words is "twenty-one billion, five hundred seventy-two million, one hundred twenty-six thousand, eighty-four".