18505036 has 12 divisors (see below), whose sum is σ = 35327880. Its totient is φ = 8411360.

The previous prime is 18505013. The next prime is 18505037. The reversal of 18505036 is 63050581.

It is a super-2 number, since 2×18505036² = 684872714722592, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 18504995 and 18505013.

It is not an unprimeable number, because it can be changed into a prime (18505037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210241 + ... + 210328.

It is an arithmetic number, because the mean of its divisors is an integer number (2943990).

Almost surely, 2^18505036 is an apocalyptic number.

It is an amenable number.

18505036 is a deficient number, since it is larger than the sum of its proper divisors (16822844).

18505036 is a wasteful number, since it uses less digits than its factorization.

18505036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420584 (or 420582 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 18505036 is about 4301.7480167950. The cubic root of 18505036 is about 264.5026199142.

It can be divided in two parts, 1850 and 5036, that added together give a palindrome (6886).

The spelling of 18505036 in words is "eighteen million, five hundred five thousand, thirty-six".