18122104 has 128 divisors (see below), whose sum is σ = 47738880. Its totient is φ = 6220800.

The previous prime is 18122101. The next prime is 18122107. The reversal of 18122104 is 40122181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18122101) and next prime (18122107).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18122101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248212 + ... + 248284.

It is an arithmetic number, because the mean of its divisors is an integer number (372960).

Almost surely, 2^18122104 is an apocalyptic number.

18122104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18122104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23869440).

18122104 is an abundant number, since it is smaller than the sum of its proper divisors (29616776).

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

18122104 is a wasteful number, since it uses less digits than its factorization.

18122104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 18122104 is about 4257.0064599434. The cubic root of 18122104 is about 262.6654026353.

Adding to 18122104 its reverse (40122181), we get a palindrome (58244285).

It can be divided in two parts, 1812 and 2104, that added together give a triangular number (3916 = T₈₈).

The spelling of 18122104 in words is "eighteen million, one hundred twenty-two thousand, one hundred four".