18434480 has 20 divisors (see below), whose sum is σ = 42860352. Its totient is φ = 7373760.

The previous prime is 18434417. The next prime is 18434483. The reversal of 18434480 is 8443481.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (18434483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115136 + ... + 115295.

Almost surely, 2^18434480 is an apocalyptic number.

18434480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18434480 is an abundant number, since it is smaller than the sum of its proper divisors (24425872).

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

18434480 is a wasteful number, since it uses less digits than its factorization.

18434480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230444 (or 230438 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 18434480 is about 4293.5393325321. The cubic root of 18434480 is about 264.1660265729.

Subtracting from 18434480 its reverse (8443481), we obtain a palindrome (9990999).

The spelling of 18434480 in words is "eighteen million, four hundred thirty-four thousand, four hundred eighty".