18051005 has 32 divisors (see below), whose sum is σ = 26002944. Its totient is φ = 11771136.

The previous prime is 18051001. The next prime is 18051031. The reversal of 18051005 is 50015081.

It is a cyclic number.

It is not a de Polignac number, because 18051005 - 2² = 18051001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18051001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68504 + ... + 68766.

It is an arithmetic number, because the mean of its divisors is an integer number (812592).

Almost surely, 2^18051005 is an apocalyptic number.

It is an amenable number.

18051005 is a deficient number, since it is larger than the sum of its proper divisors (7951939).

18051005 is a wasteful number, since it uses less digits than its factorization.

18051005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 18051005 is about 4248.6474318305. The cubic root of 18051005 is about 262.3214447099.

Adding to 18051005 its reverse (50015081), we get a palindrome (68066086).

It can be divided in two parts, 180 and 51005, that multiplied together give a square (9180900 = 3030²).

The spelling of 18051005 in words is "eighteen million, fifty-one thousand, five".