21585124803179 has 8 divisors (see below), whose sum is σ = 24676302125568. Its totient is φ = 18495844497000.

The previous prime is 21585124803119. The next prime is 21585124803259. The reversal of 21585124803179 is 97130842158512.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21585124803179 is a prime.

It is a super-2 number, since 2×21585124803179² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21585124803119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474229667 + ... + 474275180.

It is an arithmetic number, because the mean of its divisors is an integer number (3084537765696).

Almost surely, 2^{21585124803179} is an apocalyptic number.

21585124803179 is a deficient number, since it is larger than the sum of its proper divisors (3091177322389).

21585124803179 is an equidigital number, since it uses as much as digits as its factorization.

21585124803179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948508105.

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 21585124803179 in words is "twenty-one trillion, five hundred eighty-five billion, one hundred twenty-four million, eight hundred three thousand, one hundred seventy-nine".