18838418 has 8 divisors (see below), whose sum is σ = 28480512. Its totient is φ = 9344916.

The previous prime is 18838411. The next prime is 18838451. The reversal of 18838418 is 81483881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18838411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36830 + ... + 37337.

It is an arithmetic number, because the mean of its divisors is an integer number (3560064).

Almost surely, 2^18838418 is an apocalyptic number.

18838418 is a deficient number, since it is larger than the sum of its proper divisors (9642094).

18838418 is a wasteful number, since it uses less digits than its factorization.

18838418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74296.

The product of its digits is 49152, while the sum is 41.

The square root of 18838418 is about 4340.3246422359. The cubic root of 18838418 is about 266.0815793648.

It can be divided in two parts, 1883 and 8418, that added together give a palindrome (10301).

The spelling of 18838418 in words is "eighteen million, eight hundred thirty-eight thousand, four hundred eighteen".