18783480 has 64 divisors (see below), whose sum is σ = 56766240. Its totient is φ = 4972032.

The previous prime is 18783473. The next prime is 18783491. The reversal of 18783480 is 8438781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18342 + ... + 19338.

Almost surely, 2^18783480 is an apocalyptic number.

18783480 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 18783480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28383120).

18783480 is an abundant number, since it is smaller than the sum of its proper divisors (37982760).

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

18783480 is a wasteful number, since it uses less digits than its factorization.

18783480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 18783480 is about 4333.9912321093. The cubic root of 18783480 is about 265.8226718688.

The spelling of 18783480 in words is "eighteen million, seven hundred eighty-three thousand, four hundred eighty".