18518148 has 72 divisors (see below), whose sum is σ = 51682176. Its totient is φ = 5544000.

The previous prime is 18518113. The next prime is 18518161. The reversal of 18518148 is 84181581.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39765 + ... + 40227.

It is an arithmetic number, because the mean of its divisors is an integer number (717808).

Almost surely, 2^18518148 is an apocalyptic number.

18518148 is a gapful number since it is divisible by the number (18) 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 18518148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25841088).

18518148 is an abundant number, since it is smaller than the sum of its proper divisors (33164028).

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

18518148 is a wasteful number, since it uses less digits than its factorization.

18518148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 580 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 18518148 is about 4303.2717785425. The cubic root of 18518148 is about 264.5650774985.

It can be divided in two parts, 1851 and 8148, that added together give a palindrome (9999).

The spelling of 18518148 in words is "eighteen million, five hundred eighteen thousand, one hundred forty-eight".