18912480 has 144 divisors (see below), whose sum is σ = 63059472. Its totient is φ = 4761600.

The previous prime is 18912473. The next prime is 18912497. The reversal of 18912480 is 8421981.

It is a congruent number.

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, 461260 + ... + 461300.

It is an arithmetic number, because the mean of its divisors is an integer number (437913).

Almost surely, 2^18912480 is an apocalyptic number.

18912480 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 18912480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31529736).

18912480 is an abundant number, since it is smaller than the sum of its proper divisors (44146992).

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

18912480 is a wasteful number, since it uses less digits than its factorization.

18912480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18912480 is about 4348.8481233540. The cubic root of 18912480 is about 266.4298174743.

It can be divided in two parts, 1891 and 2480, that added together give a triangular number (4371 = T₉₃).

The spelling of 18912480 in words is "eighteen million, nine hundred twelve thousand, four hundred eighty".