18449154 has 64 divisors (see below), whose sum is σ = 43130880. Its totient is φ = 5838480.

The previous prime is 18449147. The next prime is 18449183. The reversal of 18449154 is 45194481.

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, 172369 + ... + 172475.

It is an arithmetic number, because the mean of its divisors is an integer number (673920).

Almost surely, 2^18449154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18449154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21565440).

18449154 is an abundant number, since it is smaller than the sum of its proper divisors (24681726).

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

18449154 is a wasteful number, since it uses less digits than its factorization.

18449154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 246 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 18449154 is about 4295.2478391823. The cubic root of 18449154 is about 264.2361007706.

The spelling of 18449154 in words is "eighteen million, four hundred forty-nine thousand, one hundred fifty-four".