18996156 has 18 divisors (see below), whose sum is σ = 48018152. Its totient is φ = 6332040.

The previous prime is 18996151. The next prime is 18996163. The reversal of 18996156 is 65169981.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18996151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263800 + ... + 263871.

Almost surely, 2^18996156 is an apocalyptic number.

It is an amenable number.

18996156 is an abundant number, since it is smaller than the sum of its proper divisors (29021996).

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

18996156 is a wasteful number, since it uses less digits than its factorization.

18996156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527681 (or 527676 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 18996156 is about 4358.4579841958. The cubic root of 18996156 is about 266.8221683323.

The spelling of 18996156 in words is "eighteen million, nine hundred ninety-six thousand, one hundred fifty-six".