18402108 has 48 divisors (see below), whose sum is σ = 46273920. Its totient is φ = 5673024.

The previous prime is 18402103. The next prime is 18402113. The reversal of 18402108 is 80120481.

It is an interprime number because it is at equal distance from previous prime (18402103) and next prime (18402113).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18402101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8866 + ... + 10742.

It is an arithmetic number, because the mean of its divisors is an integer number (964040).

Almost surely, 2^18402108 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 18402108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23136960).

18402108 is an abundant number, since it is smaller than the sum of its proper divisors (27871812).

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

18402108 is a wasteful number, since it uses less digits than its factorization.

18402108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 1944 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 18402108 is about 4289.7678258852. The cubic root of 18402108 is about 264.0113057601.

Adding to 18402108 its reverse (80120481), we get a palindrome (98522589).

The spelling of 18402108 in words is "eighteen million, four hundred two thousand, one hundred eight".