18174968030521 has 15 divisors (see below), whose sum is σ = 19003458030501. Its totient is φ = 17382594844428.

The previous prime is 18174968030519. The next prime is 18174968030543. The reversal of 18174968030521 is 12503086947181.

The square root of 18174968030521 is 4263211.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 18174968030521 - 2¹ = 18174968030519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18174968030561) 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 14 ways as a sum of consecutive naturals, for example, 2255234590 + ... + 2255242648.

It is a 1-persistent number, because it is pandigital, but 2⋅18174968030521 = 36349936061042 is not.

Almost surely, 2^{18174968030521} is an apocalyptic number.

18174968030521 is the 4263211-st square number.

18174968030521 is the 2131606-th centered octagonal number.

It is an amenable number.

18174968030521 is a deficient number, since it is larger than the sum of its proper divisors (828489999980).

18174968030521 is an frugal number, since it uses more digits than its factorization.

18174968030521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16210 (or 8082 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 18174968030521 in words is "eighteen trillion, one hundred seventy-four billion, nine hundred sixty-eight million, thirty thousand, five hundred twenty-one".