18135996 has 24 divisors (see below), whose sum is σ = 42430080. Its totient is φ = 6029232.

The previous prime is 18135979. The next prime is 18136003. The reversal of 18135996 is 69953181.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3225 + ... + 6831.

It is an arithmetic number, because the mean of its divisors is an integer number (1767920).

Almost surely, 2^18135996 is an apocalyptic number.

It is an amenable number.

18135996 is an abundant number, since it is smaller than the sum of its proper divisors (24294084).

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

18135996 is a wasteful number, since it uses less digits than its factorization.

18135996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033 (or 4031 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 18135996 is about 4258.6378103802. The cubic root of 18135996 is about 262.7325033018.

The spelling of 18135996 in words is "eighteen million, one hundred thirty-five thousand, nine hundred ninety-six".