21754406403344 has 20 divisors (see below), whose sum is σ = 42656983642896. Its totient is φ = 10746152560032.

The previous prime is 21754406403313. The next prime is 21754406403391. The reversal of 21754406403344 is 44330460445712.

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, 8190663734 + ... + 8190666389.

Almost surely, 2^{21754406403344} is an apocalyptic number.

It is an amenable number.

21754406403344 is a deficient number, since it is larger than the sum of its proper divisors (20902577239552).

21754406403344 is a wasteful number, since it uses less digits than its factorization.

21754406403344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16381330214 (or 16381330208 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 47.

The spelling of 21754406403344 in words is "twenty-one trillion, seven hundred fifty-four billion, four hundred six million, four hundred three thousand, three hundred forty-four".