18202986 has 12 divisors (see below), whose sum is σ = 39439842. Its totient is φ = 6067656.

The previous prime is 18202973. The next prime is 18203033. The reversal of 18202986 is 68920281.

It can be written as a sum of positive squares in only one way, i.e., 17264025 + 938961 = 4155^2 + 969^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18202986.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 505621 + ... + 505656.

Almost surely, 2^18202986 is an apocalyptic number.

18202986 is an abundant number, since it is smaller than the sum of its proper divisors (21236856).

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

18202986 is a wasteful number, since it uses less digits than its factorization.

18202986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011285 (or 1011282 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18202986 is about 4266.4957517851. The cubic root of 18202986 is about 263.0555960093.

The spelling of 18202986 in words is "eighteen million, two hundred two thousand, nine hundred eighty-six".