18023316 has 12 divisors (see below), whose sum is σ = 42054432. Its totient is φ = 6007768.

The previous prime is 18023293. The next prime is 18023323. The reversal of 18023316 is 61332081.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750960 + ... + 750983.

It is an arithmetic number, because the mean of its divisors is an integer number (3504536).

Almost surely, 2^18023316 is an apocalyptic number.

It is an amenable number.

18023316 is an abundant number, since it is smaller than the sum of its proper divisors (24031116).

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

18023316 is a wasteful number, since it uses less digits than its factorization.

18023316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501950 (or 1501948 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 18023316 is about 4245.3876148121. The cubic root of 18023316 is about 262.1872483865.

Adding to 18023316 its reverse (61332081), we get a palindrome (79355397).

The spelling of 18023316 in words is "eighteen million, twenty-three thousand, three hundred sixteen".