18113424 has 160 divisors (see below), whose sum is σ = 57901056. Its totient is φ = 4769280.

The previous prime is 18113423. The next prime is 18113437. The reversal of 18113424 is 42431181.

It is a super-2 number, since 2×18113424² = 656192258007552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a junction number, because it is equal to n+sod(n) for n = 18113394 and 18113403.

It is not an unprimeable number, because it can be changed into a prime (18113423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385369 + ... + 385415.

Almost surely, 2^18113424 is an apocalyptic number.

18113424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18113424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28950528).

18113424 is an abundant number, since it is smaller than the sum of its proper divisors (39787632).

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

18113424 is a wasteful number, since it uses less digits than its factorization.

18113424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 127 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 18113424 is about 4255.9868420849. The cubic root of 18113424 is about 262.6234593856.

The spelling of 18113424 in words is "eighteen million, one hundred thirteen thousand, four hundred twenty-four".