18243016 has 16 divisors (see below), whose sum is σ = 37315440. Its totient is φ = 8292240.

The previous prime is 18243013. The next prime is 18243019. The reversal of 18243016 is 61034281.

It is an interprime number because it is at equal distance from previous prime (18243013) and next prime (18243019).

It is not an unprimeable number, because it can be changed into a prime (18243013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103566 + ... + 103741.

It is an arithmetic number, because the mean of its divisors is an integer number (2332215).

Almost surely, 2^18243016 is an apocalyptic number.

It is an amenable number.

18243016 is an abundant number, since it is smaller than the sum of its proper divisors (19072424).

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

18243016 is a wasteful number, since it uses less digits than its factorization.

18243016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207324 (or 207320 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 18243016 is about 4271.1843790686. The cubic root of 18243016 is about 263.2482824552.

Adding to 18243016 its reverse (61034281), we get a palindrome (79277297).

The spelling of 18243016 in words is "eighteen million, two hundred forty-three thousand, sixteen".