18218024 has 32 divisors (see below), whose sum is σ = 38888640. Its totient is φ = 7920000.

The previous prime is 18217993. The next prime is 18218027. The reversal of 18218024 is 42081281.

18218024 = 12² + 13² + ... + 379².

It is a junction number, because it is equal to n+sod(n) for n = 18217984 and 18218002.

It is not an unprimeable number, because it can be changed into a prime (18218027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2477 + ... + 6524.

It is an arithmetic number, because the mean of its divisors is an integer number (1215270).

Almost surely, 2^18218024 is an apocalyptic number.

It is an amenable number.

18218024 is an abundant number, since it is smaller than the sum of its proper divisors (20670616).

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

18218024 is a wasteful number, since it uses less digits than its factorization.

18218024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9041 (or 9037 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 18218024 is about 4268.2577241774. The cubic root of 18218024 is about 263.1280152855.

The spelling of 18218024 in words is "eighteen million, two hundred eighteen thousand, twenty-four".