18005036 has 24 divisors (see below), whose sum is σ = 36103200. Its totient is φ = 7696512.

The previous prime is 18004999. The next prime is 18005041. The reversal of 18005036 is 63050081.

It is a super-2 number, since 2×18005036² = 648362642722592, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 16640 + ... + 17688.

It is an arithmetic number, because the mean of its divisors is an integer number (1504300).

Almost surely, 2^18005036 is an apocalyptic number.

It is an amenable number.

18005036 is an abundant number, since it is smaller than the sum of its proper divisors (18098164).

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

18005036 is a wasteful number, since it uses less digits than its factorization.

18005036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 18005036 is about 4243.2341439049. The cubic root of 18005036 is about 262.0985779820.

It can be divided in two parts, 180050 and 36, that multiplied together give a triangular number (6481800 = T₃₆₀₀).

The spelling of 18005036 in words is "eighteen million, five thousand, thirty-six".