21452513116016 has 10 divisors (see below), whose sum is σ = 41564244162312. Its totient is φ = 10726256558000.

The previous prime is 21452513115973. The next prime is 21452513116051. The reversal of 21452513116016 is 61061131525412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670391034860 + ... + 670391034891.

Almost surely, 2^{21452513116016} is an apocalyptic number.

It is an amenable number.

21452513116016 is a deficient number, since it is larger than the sum of its proper divisors (20111731046296).

21452513116016 is a wasteful number, since it uses less digits than its factorization.

21452513116016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340782069759 (or 1340782069753 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 21452513116016 in words is "twenty-one trillion, four hundred fifty-two billion, five hundred thirteen million, one hundred sixteen thousand, sixteen".