21548006672 has 20 divisors (see below), whose sum is σ = 41758755840. Its totient is φ = 10771553568.

The previous prime is 21548006663. The next prime is 21548006693. The reversal of 21548006672 is 27660084512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79472 + ... + 222287.

It is an arithmetic number, because the mean of its divisors is an integer number (2087937792).

Almost surely, 2^21548006672 is an apocalyptic number.

It is an amenable number.

21548006672 is a deficient number, since it is larger than the sum of its proper divisors (20210749168).

21548006672 is a wasteful number, since it uses less digits than its factorization.

21548006672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306230 (or 306224 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 21548006672 in words is "twenty-one billion, five hundred forty-eight million, six thousand, six hundred seventy-two".