21620725606444 has 48 divisors (see below), whose sum is σ = 38296083752640. Its totient is φ = 10679212544000.

The previous prime is 21620725606423. The next prime is 21620725606511. The reversal of 21620725606444 is 44460652702612.

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, 2673512169 + ... + 2673520255.

It is an arithmetic number, because the mean of its divisors is an integer number (797835078180).

Almost surely, 2^{21620725606444} is an apocalyptic number.

It is an amenable number.

21620725606444 is a deficient number, since it is larger than the sum of its proper divisors (16675358146196).

21620725606444 is a wasteful number, since it uses less digits than its factorization.

21620725606444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14058 (or 14056 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 21620725606444 in words is "twenty-one trillion, six hundred twenty billion, seven hundred twenty-five million, six hundred six thousand, four hundred forty-four".