18148816 has 40 divisors (see below), whose sum is σ = 41019200. Its totient is φ = 7775712.

The previous prime is 18148811. The next prime is 18148849. The reversal of 18148816 is 61884181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18148811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3835 + ... + 7141.

It is an arithmetic number, because the mean of its divisors is an integer number (1025480).

Almost surely, 2^18148816 is an apocalyptic number.

18148816 is a gapful number since it is divisible by the number (16) 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 18148816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20509600).

18148816 is an abundant number, since it is smaller than the sum of its proper divisors (22870384).

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

18148816 is an equidigital number, since it uses as much as digits as its factorization.

18148816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336 (or 3316 counting only the distinct ones).

The product of its digits is 12288, while the sum is 37.

The square root of 18148816 is about 4260.1427206139. The cubic root of 18148816 is about 262.7943956357.

The spelling of 18148816 in words is "eighteen million, one hundred forty-eight thousand, eight hundred sixteen".