18474480 has 100 divisors (see below), whose sum is σ = 64187112. Its totient is φ = 4924800.

The previous prime is 18474457. The next prime is 18474487. The reversal of 18474480 is 8447481.

It is a happy number.

It is a super-2 number, since 2×18474480² = 682612822540800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18474487) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 5055 + ... + 7905.

Almost surely, 2^18474480 is an apocalyptic number.

18474480 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 18474480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32093556).

18474480 is an abundant number, since it is smaller than the sum of its proper divisors (45712632).

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

18474480 is a wasteful number, since it uses less digits than its factorization.

18474480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876 (or 2861 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 18474480 is about 4298.1949699845. The cubic root of 18474480 is about 264.3569551589.

The spelling of 18474480 in words is "eighteen million, four hundred seventy-four thousand, four hundred eighty".