18255996 has 96 divisors (see below), whose sum is σ = 52469760. Its totient is φ = 5488560.

The previous prime is 18255989. The next prime is 18256003. The reversal of 18255996 is 69955281.

18255996 is a `hidden beast` number, since 1 + 8 + 2 + 559 + 96 = 666.

It is an interprime number because it is at equal distance from previous prime (18255989) and next prime (18256003).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 143685 + ... + 143811.

It is an arithmetic number, because the mean of its divisors is an integer number (546560).

Almost surely, 2^18255996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18255996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26234880).

18255996 is an abundant number, since it is smaller than the sum of its proper divisors (34213764).

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

18255996 is a wasteful number, since it uses less digits than its factorization.

18255996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 143 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 18255996 is about 4272.7035937448. The cubic root of 18255996 is about 263.3107018240.

The spelling of 18255996 in words is "eighteen million, two hundred fifty-five thousand, nine hundred ninety-six".