21552616004 has 48 divisors (see below), whose sum is σ = 38918880000. Its totient is φ = 10437512736.

The previous prime is 21552615991. The next prime is 21552616021. The reversal of 21552616004 is 40061625512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14377247 + ... + 14378745.

It is an arithmetic number, because the mean of its divisors is an integer number (810810000).

Almost surely, 2^21552616004 is an apocalyptic number.

It is an amenable number.

21552616004 is a deficient number, since it is larger than the sum of its proper divisors (17366263996).

21552616004 is a wasteful number, since it uses less digits than its factorization.

21552616004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2190 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 21552616004 in words is "twenty-one billion, five hundred fifty-two million, six hundred sixteen thousand, four".