17972579521 has 8 divisors (see below), whose sum is σ = 19441882880. Its totient is φ = 16515675792.

The previous prime is 17972579501. The next prime is 17972579593. The reversal of 17972579521 is 12597527971.

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 17972579521 - 2¹¹ = 17972577473 is a prime.

It is a super-2 number, since 2×17972579521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17972579501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3096891 + ... + 3102688.

It is an arithmetic number, because the mean of its divisors is an integer number (2430235360).

Almost surely, 2^17972579521 is an apocalyptic number.

It is an amenable number.

17972579521 is a deficient number, since it is larger than the sum of its proper divisors (1469303359).

17972579521 is a wasteful number, since it uses less digits than its factorization.

17972579521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199815.

The product of its digits is 2778300, while the sum is 55.

The spelling of 17972579521 in words is "seventeen billion, nine hundred seventy-two million, five hundred seventy-nine thousand, five hundred twenty-one".