18287632 has 40 divisors (see below), whose sum is σ = 39997440. Its totient is φ = 8023680.

The previous prime is 18287623. The next prime is 18287641. The reversal of 18287632 is 23678281.

It is an interprime number because it is at equal distance from previous prime (18287623) and next prime (18287641).

It is a junction number, because it is equal to n+sod(n) for n = 18287591 and 18287600.

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, 3313 + ... + 6895.

It is an arithmetic number, because the mean of its divisors is an integer number (999936).

Almost surely, 2^18287632 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 18287632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19998720).

18287632 is an abundant number, since it is smaller than the sum of its proper divisors (21709808).

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

18287632 is a wasteful number, since it uses less digits than its factorization.

18287632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3631 (or 3625 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 18287632 is about 4276.4040969020. The cubic root of 18287632 is about 263.4627119768.

The spelling of 18287632 in words is "eighteen million, two hundred eighty-seven thousand, six hundred thirty-two".