21216543602514 has 64 divisors (see below), whose sum is σ = 48173761776000. Its totient is φ = 6175389652992.

The previous prime is 21216543602467. The next prime is 21216543602531. The reversal of 21216543602514 is 41520634561212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9638689 + ... + 11633460.

It is an arithmetic number, because the mean of its divisors is an integer number (752715027750).

Almost surely, 2^{21216543602514} is an apocalyptic number.

21216543602514 is an abundant number, since it is smaller than the sum of its proper divisors (26957218173486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21216543602514 is a wasteful number, since it uses less digits than its factorization.

21216543602514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21272859.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 21216543602514 in words is "twenty-one trillion, two hundred sixteen billion, five hundred forty-three million, six hundred two thousand, five hundred fourteen".