18149802 has 32 divisors (see below), whose sum is σ = 40449024. Its totient is φ = 5382000.

The previous prime is 18149779. The next prime is 18149819. The reversal of 18149802 is 20894181.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177 + ... + 6027.

It is an arithmetic number, because the mean of its divisors is an integer number (1264032).

Almost surely, 2^18149802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18149802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20224512).

18149802 is an abundant number, since it is smaller than the sum of its proper divisors (22299222).

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

18149802 is a wasteful number, since it uses less digits than its factorization.

18149802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5914.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18149802 is about 4260.2584428647. The cubic root of 18149802 is about 262.7991546345.

The spelling of 18149802 in words is "eighteen million, one hundred forty-nine thousand, eight hundred two".