18143480 has 32 divisors (see below), whose sum is σ = 42973200. Its totient is φ = 6875136.

The previous prime is 18143467. The next prime is 18143483. The reversal of 18143480 is 8434181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18143483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11177 + ... + 12696.

Almost surely, 2^18143480 is an apocalyptic number.

18143480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18143480 is an abundant number, since it is smaller than the sum of its proper divisors (24829720).

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

18143480 is a wasteful number, since it uses less digits than its factorization.

18143480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23903 (or 23899 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 18143480 is about 4259.5164044760. The cubic root of 18143480 is about 262.7686380629.

The spelling of 18143480 in words is "eighteen million, one hundred forty-three thousand, four hundred eighty".