21807260326616 has 64 divisors (see below), whose sum is σ = 42368100986880. Its totient is φ = 10511815991040.

The previous prime is 21807260326601. The next prime is 21807260326637. The reversal of 21807260326616 is 61662306270812.

It is a happy number.

It is a super-2 number, since 2×21807260326616² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 129314945 + ... + 129483471.

It is an arithmetic number, because the mean of its divisors is an integer number (662001577920).

Almost surely, 2^{21807260326616} is an apocalyptic number.

It is an amenable number.

21807260326616 is a deficient number, since it is larger than the sum of its proper divisors (20560840660264).

21807260326616 is a wasteful number, since it uses less digits than its factorization.

21807260326616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170544 (or 170540 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 21807260326616 in words is "twenty-one trillion, eight hundred seven billion, two hundred sixty million, three hundred twenty-six thousand, six hundred sixteen".