18481824 has 48 divisors (see below), whose sum is σ = 53907840. Its totient is φ = 6160320.

The previous prime is 18481807. The next prime is 18481831. The reversal of 18481824 is 42818481.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9832 + ... + 11559.

It is an arithmetic number, because the mean of its divisors is an integer number (1123080).

Almost surely, 2^18481824 is an apocalyptic number.

It is an amenable number.

18481824 is an abundant number, since it is smaller than the sum of its proper divisors (35426016).

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

18481824 is a wasteful number, since it uses less digits than its factorization.

18481824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21410 (or 21396 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 18481824 is about 4299.0491972063. The cubic root of 18481824 is about 264.3919796951.

The spelling of 18481824 in words is "eighteen million, four hundred eighty-one thousand, eight hundred twenty-four".