18243484 has 24 divisors (see below), whose sum is σ = 37234400. Its totient is φ = 7818048.

The previous prime is 18243457. The next prime is 18243509. The reversal of 18243484 is 48434281.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5277 + ... + 8020.

Almost surely, 2^18243484 is an apocalyptic number.

18243484 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18243484 is an abundant number, since it is smaller than the sum of its proper divisors (18990916).

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

18243484 is a wasteful number, since it uses less digits than its factorization.

18243484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13322 (or 13306 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 18243484 is about 4271.2391644580. The cubic root of 18243484 is about 263.2505335293.

The spelling of 18243484 in words is "eighteen million, two hundred forty-three thousand, four hundred eighty-four".