18478824 has 64 divisors (see below), whose sum is σ = 56864640. Its totient is φ = 4872960.

The previous prime is 18478783. The next prime is 18478843. The reversal of 18478824 is 42887481.

It is a Harshad number since it is a multiple of its sum of digits (42).

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

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, 2047 + ... + 6414.

It is an arithmetic number, because the mean of its divisors is an integer number (888510).

Almost surely, 2^18478824 is an apocalyptic number.

18478824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18478824 is an abundant number, since it is smaller than the sum of its proper divisors (38385816).

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

18478824 is a wasteful number, since it uses less digits than its factorization.

18478824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8490 (or 8486 counting only the distinct ones).

The product of its digits is 114688, while the sum is 42.

The square root of 18478824 is about 4298.7002686859. The cubic root of 18478824 is about 264.3776734077.

The spelling of 18478824 in words is "eighteen million, four hundred seventy-eight thousand, eight hundred twenty-four".