21375171334552 has 64 divisors (see below), whose sum is σ = 48279917088000. Its totient is φ = 8666896910976.

The previous prime is 21375171334541. The next prime is 21375171334631. The reversal of 21375171334552 is 25543317157312.

It is a junction number, because it is equal to n+sod(n) for n = 21375171334496 and 21375171334505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12806023 + ... + 14378614.

It is an arithmetic number, because the mean of its divisors is an integer number (754373704500).

Almost surely, 2^{21375171334552} is an apocalyptic number.

It is an amenable number.

21375171334552 is an abundant number, since it is smaller than the sum of its proper divisors (26904745753448).

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

21375171334552 is a wasteful number, since it uses less digits than its factorization.

21375171334552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27185408 (or 27185404 counting only the distinct ones).

The product of its digits is 2646000, while the sum is 49.

The spelling of 21375171334552 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred seventy-one million, three hundred thirty-four thousand, five hundred fifty-two".