18395149516 has 24 divisors (see below), whose sum is σ = 33892260080. Its totient is φ = 8711831232.

The previous prime is 18395149501. The next prime is 18395149517. The reversal of 18395149516 is 61594159381.

It is not an unprimeable number, because it can be changed into a prime (18395149517) 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 7 ways as a sum of consecutive naturals, for example, 438766 + ... + 478858.

Almost surely, 2^18395149516 is an apocalyptic number.

It is an amenable number.

18395149516 is a deficient number, since it is larger than the sum of its proper divisors (15497110564).

18395149516 is a wasteful number, since it uses less digits than its factorization.

18395149516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46153 (or 46151 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 52.

The spelling of 18395149516 in words is "eighteen billion, three hundred ninety-five million, one hundred forty-nine thousand, five hundred sixteen".