18003018156 has 48 divisors (see below), whose sum is σ = 45104532480. Its totient is φ = 5568451840.

The previous prime is 18003018113. The next prime is 18003018157. The reversal of 18003018156 is 65181030081.

It is not an unprimeable number, because it can be changed into a prime (18003018157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606996 + ... + 635963.

It is an arithmetic number, because the mean of its divisors is an integer number (939677760).

Almost surely, 2^18003018156 is an apocalyptic number.

It is an amenable number.

18003018156 is an abundant number, since it is smaller than the sum of its proper divisors (27101514324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18003018156 is a wasteful number, since it uses less digits than its factorization.

18003018156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243054 (or 1243052 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The spelling of 18003018156 in words is "eighteen billion, three million, eighteen thousand, one hundred fifty-six".