21438718068082 has 16 divisors (see below), whose sum is σ = 36787123497600. Its totient is φ = 9179263183968.

The previous prime is 21438718068043. The next prime is 21438718068133. The reversal of 21438718068082 is 28086081783412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729888558 + ... + 729917929.

It is an arithmetic number, because the mean of its divisors is an integer number (2299195218600).

Almost surely, 2^{21438718068082} is an apocalyptic number.

21438718068082 is a deficient number, since it is larger than the sum of its proper divisors (15348405429518).

21438718068082 is a wasteful number, since it uses less digits than its factorization.

21438718068082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459807545.

The product of its (nonzero) digits is 8257536, while the sum is 58.

The spelling of 21438718068082 in words is "twenty-one trillion, four hundred thirty-eight billion, seven hundred eighteen million, sixty-eight thousand, eighty-two".