21375060723605 has 8 divisors (see below), whose sum is σ = 25656455095200. Its totient is φ = 17095793760976.

The previous prime is 21375060723481. The next prime is 21375060723637. The reversal of 21375060723605 is 50632706057312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21375060723605 - 2²² = 21375056529301 is a prime.

It is a super-2 number, since 2×21375060723605² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21375060723605.

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 7 ways as a sum of consecutive naturals, for example, 531830135 + ... + 531870324.

It is an arithmetic number, because the mean of its divisors is an integer number (3207056886900).

Almost surely, 2^{21375060723605} is an apocalyptic number.

It is an amenable number.

21375060723605 is a deficient number, since it is larger than the sum of its proper divisors (4281394371595).

21375060723605 is a wasteful number, since it uses less digits than its factorization.

21375060723605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063704483.

The product of its (nonzero) digits is 1587600, while the sum is 47.

The spelling of 21375060723605 in words is "twenty-one trillion, three hundred seventy-five billion, sixty million, seven hundred twenty-three thousand, six hundred five".