18480540 has 192 divisors, whose sum is σ = 62092800. Its totient is φ = 4064256.

The previous prime is 18480503. The next prime is 18480571. The reversal of 18480540 is 4508481.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18480498 and 18480507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 429759 + ... + 429801.

It is an arithmetic number, because the mean of its divisors is an integer number (323400).

Almost surely, 2^18480540 is an apocalyptic number.

18480540 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 18480540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31046400).

18480540 is an abundant number, since it is smaller than the sum of its proper divisors (43612260).

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

18480540 is a wasteful number, since it uses less digits than its factorization.

18480540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 18480540 is about 4298.8998592663. The cubic root of 18480540 is about 264.3858567936.

The spelling of 18480540 in words is "eighteen million, four hundred eighty thousand, five hundred forty".