18229376 has 64 divisors (see below), whose sum is σ = 40318560. Its totient is φ = 8208640.

The previous prime is 18229369. The next prime is 18229381. The reversal of 18229376 is 67392281.

It is a tau number, because it is divible by the number of its divisors (64).

It is a nialpdrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170315 + ... + 170421.

Almost surely, 2^18229376 is an apocalyptic number.

18229376 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 18229376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20159280).

18229376 is an abundant number, since it is smaller than the sum of its proper divisors (22089184).

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

18229376 is an equidigital number, since it uses as much as digits as its factorization.

18229376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 120 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 18229376 is about 4269.5873336893. The cubic root of 18229376 is about 263.1826573077.

The spelling of 18229376 in words is "eighteen million, two hundred twenty-nine thousand, three hundred seventy-six".