18518756429 has 12 divisors (see below), whose sum is σ = 20377828800. Its totient is φ = 16781289624.

The previous prime is 18518756369. The next prime is 18518756437. The reversal of 18518756429 is 92465781581.

It is not a de Polignac number, because 18518756429 - 2¹² = 18518752333 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 (18518756449) 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 11 ways as a sum of consecutive naturals, for example, 911189 + ... + 931290.

It is an arithmetic number, because the mean of its divisors is an integer number (1698152400).

Almost surely, 2^18518756429 is an apocalyptic number.

18518756429 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18518756429 is a deficient number, since it is larger than the sum of its proper divisors (1859072371).

18518756429 is a wasteful number, since it uses less digits than its factorization.

18518756429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842544 (or 1842521 counting only the distinct ones).

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

The spelling of 18518756429 in words is "eighteen billion, five hundred eighteen million, seven hundred fifty-six thousand, four hundred twenty-nine".