18143104 has 32 divisors (see below), whose sum is σ = 41310000. Its totient is φ = 7775232.

The previous prime is 18143101. The next prime is 18143123. The reversal of 18143104 is 40134181.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18143101) 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, 9229 + ... + 11020.

Almost surely, 2^18143104 is an apocalyptic number.

18143104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18143104 is an abundant number, since it is smaller than the sum of its proper divisors (23166896).

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

18143104 is an equidigital number, since it uses as much as digits as its factorization.

18143104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20270 (or 20258 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 18143104 is about 4259.4722677815. The cubic root of 18143104 is about 262.7668228711.

Adding to 18143104 its reverse (40134181), we get a palindrome (58277285).

The spelling of 18143104 in words is "eighteen million, one hundred forty-three thousand, one hundred four".