18104436 has 36 divisors (see below), whose sum is σ = 52302432. Its totient is φ = 5172624.

The previous prime is 18104431. The next prime is 18104441. The reversal of 18104436 is 63440181.

It is an interprime number because it is at equal distance from previous prime (18104431) and next prime (18104441).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18104431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35670 + ... + 36173.

Almost surely, 2^18104436 is an apocalyptic number.

It is an amenable number.

18104436 is an abundant number, since it is smaller than the sum of its proper divisors (34197996).

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

18104436 is a wasteful number, since it uses less digits than its factorization.

18104436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71860 (or 71855 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18104436 is about 4254.9307867461. The cubic root of 18104436 is about 262.5800137035.

The spelling of 18104436 in words is "eighteen million, one hundred four thousand, four hundred thirty-six".