18432721359359 has 4 divisors (see below), whose sum is σ = 18432867764040. Its totient is φ = 18432574954680.

The previous prime is 18432721359293. The next prime is 18432721359419. The reversal of 18432721359359 is 95395312723481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18432721359359 - 2¹⁶ = 18432721293823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18432721389359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73013324 + ... + 73265345.

It is an arithmetic number, because the mean of its divisors is an integer number (4608216941010).

Almost surely, 2^{18432721359359} is an apocalyptic number.

18432721359359 is a deficient number, since it is larger than the sum of its proper divisors (146404681).

18432721359359 is a wasteful number, since it uses less digits than its factorization.

18432721359359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146404680.

The product of its digits is 48988800, while the sum is 62.

The spelling of 18432721359359 in words is "eighteen trillion, four hundred thirty-two billion, seven hundred twenty-one million, three hundred fifty-nine thousand, three hundred fifty-nine".