18845480 has 16 divisors (see below), whose sum is σ = 42402420. Its totient is φ = 7538176.

The previous prime is 18845479. The next prime is 18845501. The reversal of 18845480 is 8454881.

It can be written as a sum of positive squares in 2 ways, for example, as 18438436 + 407044 = 4294^2 + 638^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235529 + ... + 235608.

Almost surely, 2^18845480 is an apocalyptic number.

18845480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18845480 is an abundant number, since it is smaller than the sum of its proper divisors (23556940).

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

18845480 is a wasteful number, since it uses less digits than its factorization.

18845480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471148 (or 471144 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 18845480 is about 4341.1380996232. The cubic root of 18845480 is about 266.1148240771.

The spelling of 18845480 in words is "eighteen million, eight hundred forty-five thousand, four hundred eighty".