18154887513 has 16 divisors (see below), whose sum is σ = 27666472320. Its totient is φ = 10373515776.

The previous prime is 18154887481. The next prime is 18154887529. The reversal of 18154887513 is 31578845181.

It is a happy number.

It is not a de Polignac number, because 18154887513 - 2⁵ = 18154887481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18154887563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599881 + ... + 629417.

It is an arithmetic number, because the mean of its divisors is an integer number (1729154520).

Almost surely, 2^18154887513 is an apocalyptic number.

It is an amenable number.

18154887513 is a deficient number, since it is larger than the sum of its proper divisors (9511584807).

18154887513 is a wasteful number, since it uses less digits than its factorization.

18154887513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58816.

The product of its digits is 1075200, while the sum is 51.

The spelling of 18154887513 in words is "eighteen billion, one hundred fifty-four million, eight hundred eighty-seven thousand, five hundred thirteen".