18484518 has 16 divisors (see below), whose sum is σ = 39812976. Its totient is φ = 5687520.

The previous prime is 18484447. The next prime is 18484519. The reversal of 18484518 is 81548481.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18484519) 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, 118413 + ... + 118568.

It is an arithmetic number, because the mean of its divisors is an integer number (2488311).

Almost surely, 2^18484518 is an apocalyptic number.

18484518 is an abundant number, since it is smaller than the sum of its proper divisors (21328458).

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

18484518 is a wasteful number, since it uses less digits than its factorization.

18484518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236999.

The product of its digits is 40960, while the sum is 39.

The square root of 18484518 is about 4299.3625108846. The cubic root of 18484518 is about 264.4048254220.

The spelling of 18484518 in words is "eighteen million, four hundred eighty-four thousand, five hundred eighteen".