18409896 has 64 divisors (see below), whose sum is σ = 52920000. Its totient is φ = 5923008.

The previous prime is 18409883. The next prime is 18409907. The reversal of 18409896 is 69890481.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4795 + ... + 7733.

It is an arithmetic number, because the mean of its divisors is an integer number (826875).

Almost surely, 2^18409896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18409896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26460000).

18409896 is an abundant number, since it is smaller than the sum of its proper divisors (34510104).

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

18409896 is a wasteful number, since it uses less digits than its factorization.

18409896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 18409896 is about 4290.6754712982. The cubic root of 18409896 is about 264.0485447920.

The spelling of 18409896 in words is "eighteen million, four hundred nine thousand, eight hundred ninety-six".