18000000396 has 72 divisors (see below), whose sum is σ = 52287426464. Its totient is φ = 5114430720.

The previous prime is 18000000391. The next prime is 18000000433. The reversal of 18000000396 is 69300000081.

18000000396 is a modest number, since divided by 396 gives 180 as remainder.

It is not an unprimeable number, because it can be changed into a prime (18000000391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151705 + ... + 242928.

Almost surely, 2^18000000396 is an apocalyptic number.

It is an amenable number.

18000000396 is an abundant number, since it is smaller than the sum of its proper divisors (34287426068).

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

18000000396 is a wasteful number, since it uses less digits than its factorization.

18000000396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394831 (or 394826 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 18000000396 in words is "eighteen billion, three hundred ninety-six", and thus it is an aban number.