18903416 has 48 divisors (see below), whose sum is σ = 41838000. Its totient is φ = 8003856.

The previous prime is 18903413. The next prime is 18903427. The reversal of 18903416 is 61430981.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18903413) 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, 227711 + ... + 227793.

It is an arithmetic number, because the mean of its divisors is an integer number (871625).

Almost surely, 2^18903416 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 18903416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20919000).

18903416 is an abundant number, since it is smaller than the sum of its proper divisors (22934584).

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

18903416 is an frugal number, since it uses more digits than its factorization.

18903416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18903416 is about 4347.8058834313. The cubic root of 18903416 is about 266.3872475987.

The spelling of 18903416 in words is "eighteen million, nine hundred three thousand, four hundred sixteen".