18113824 has 12 divisors (see below), whose sum is σ = 35661654. Its totient is φ = 9056896.

The previous prime is 18113819. The next prime is 18113839. The reversal of 18113824 is 42831181.

It can be written as a sum of positive squares in only one way, i.e., 17073424 + 1040400 = 4132^2 + 1020^2 .

It is a super-2 number, since 2×18113824² = 656221239805952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18113792 and 18113801.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282997 + ... + 283060.

Almost surely, 2^18113824 is an apocalyptic number.

It is an amenable number.

18113824 is a deficient number, since it is larger than the sum of its proper divisors (17547830).

18113824 is an equidigital number, since it uses as much as digits as its factorization.

18113824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566067 (or 566059 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 18113824 is about 4256.0338344520. The cubic root of 18113824 is about 262.6253925487.

The spelling of 18113824 in words is "eighteen million, one hundred thirteen thousand, eight hundred twenty-four".