18422424 has 128 divisors (see below), whose sum is σ = 56376000. Its totient is φ = 5548032.

The previous prime is 18422389. The next prime is 18422479. The reversal of 18422424 is 42422481.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106402 + ... + 106574.

Almost surely, 2^18422424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18422424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28188000).

18422424 is an abundant number, since it is smaller than the sum of its proper divisors (37953576).

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

18422424 is a wasteful number, since it uses less digits than its factorization.

18422424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 224 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 18422424 is about 4292.1351330078. The cubic root of 18422424 is about 264.1084265368.

The spelling of 18422424 in words is "eighteen million, four hundred twenty-two thousand, four hundred twenty-four".