18508739965 has 8 divisors (see below), whose sum is σ = 22216785120. Its totient is φ = 14802793872.

The previous prime is 18508739947. The next prime is 18508739969. The reversal of 18508739965 is 56993780581.

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 18508739965 - 2¹⁷ = 18508608893 is a prime.

It is a super-5 number, since 5×18508739965⁵ (a number of 53 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18508739969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505299 + ... + 540688.

It is an arithmetic number, because the mean of its divisors is an integer number (2777098140).

Almost surely, 2^18508739965 is an apocalyptic number.

It is an amenable number.

18508739965 is a deficient number, since it is larger than the sum of its proper divisors (3708045155).

18508739965 is a wasteful number, since it uses less digits than its factorization.

18508739965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049531.

The product of its (nonzero) digits is 16329600, while the sum is 61.

The spelling of 18508739965 in words is "eighteen billion, five hundred eight million, seven hundred thirty-nine thousand, nine hundred sixty-five".