18287046 has 40 divisors (see below), whose sum is σ = 41294880. Its totient is φ = 6048432.

The previous prime is 18287041. The next prime is 18287051. The reversal of 18287046 is 64078281.

It is an interprime number because it is at equal distance from previous prime (18287041) and next prime (18287051).

It is a super-2 number, since 2×18287046² = 668832102812232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18287046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18287041) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 25075 + ... + 25793.

It is an arithmetic number, because the mean of its divisors is an integer number (1032372).

Almost surely, 2^18287046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18287046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20647440).

18287046 is an abundant number, since it is smaller than the sum of its proper divisors (23007834).

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

18287046 is a wasteful number, since it uses less digits than its factorization.

18287046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 18287046 is about 4276.3355808449. The cubic root of 18287046 is about 263.4598978563.

The spelling of 18287046 in words is "eighteen million, two hundred eighty-seven thousand, forty-six".