18404496 has 100 divisors (see below), whose sum is σ = 58155504. Its totient is φ = 5572800.

The previous prime is 18404471. The next prime is 18404497. The reversal of 18404496 is 69440481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18404496.

It is not an unprimeable number, because it can be changed into a prime (18404497) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13611 + ... + 14901.

Almost surely, 2^18404496 is an apocalyptic number.

18404496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18404496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29077752).

18404496 is an abundant number, since it is smaller than the sum of its proper divisors (39751008).

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

18404496 is a wasteful number, since it uses less digits than its factorization.

18404496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322 (or 1307 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 18404496 is about 4290.0461535979. The cubic root of 18404496 is about 264.0227253165.

It can be divided in two parts, 1840 and 4496, that added together give a palindrome (6336).

The spelling of 18404496 in words is "eighteen million, four hundred four thousand, four hundred ninety-six".