18202002 has 128 divisors (see below), whose sum is σ = 49641984. Its totient is φ = 4313088.

The previous prime is 18201979. The next prime is 18202003. The reversal of 18202002 is 20020281.

18202002 is a modest number, since divided by 2002 gives 1820 as remainder.

It is not an unprimeable number, because it can be changed into a prime (18202003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 343408 + ... + 343460.

It is an arithmetic number, because the mean of its divisors is an integer number (387828).

Almost surely, 2^18202002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18202002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24820992).

18202002 is an abundant number, since it is smaller than the sum of its proper divisors (31439982).

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

18202002 is a wasteful number, since it uses less digits than its factorization.

18202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 18202002 is about 4266.3804331072. The cubic root of 18202002 is about 263.0508559194.

Adding to 18202002 its reverse (20020281), we get a palindrome (38222283).

The spelling of 18202002 in words is "eighteen million, two hundred two thousand, two".