18019416 has 16 divisors (see below), whose sum is σ = 45048600. Its totient is φ = 6006464.

The previous prime is 18019387. The next prime is 18019423. The reversal of 18019416 is 61491081.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 375381 + ... + 375428.

Almost surely, 2^18019416 is an apocalyptic number.

It is an amenable number.

18019416 is an abundant number, since it is smaller than the sum of its proper divisors (27029184).

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

18019416 is a wasteful number, since it uses less digits than its factorization.

18019416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750818 (or 750814 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 18019416 is about 4244.9282679452. The cubic root of 18019416 is about 262.1683357730.

The spelling of 18019416 in words is "eighteen million, nineteen thousand, four hundred sixteen".