18811480 has 32 divisors (see below), whose sum is σ = 42868800. Its totient is φ = 7428096.

The previous prime is 18811477. The next prime is 18811549. The reversal of 18811480 is 8411881.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184 + ... + 6136.

It is an arithmetic number, because the mean of its divisors is an integer number (1339650).

Almost surely, 2^18811480 is an apocalyptic number.

18811480 is a gapful number since it is divisible by the number (10) 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 18811480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21434400).

18811480 is an abundant number, since it is smaller than the sum of its proper divisors (24057320).

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

18811480 is a wasteful number, since it uses less digits than its factorization.

18811480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6043 (or 6039 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 31.

The square root of 18811480 is about 4337.2203079853. The cubic root of 18811480 is about 265.9546910598.

It can be divided in two parts, 18811 and 480, that added together give a palindrome (19291).

The spelling of 18811480 in words is "eighteen million, eight hundred eleven thousand, four hundred eighty".