18505435204 has 24 divisors (see below), whose sum is σ = 34293732480. Its totient is φ = 8707360896.

The previous prime is 18505435199. The next prime is 18505435241. The reversal of 18505435204 is 40253450581.

It is a super-2 number, since 2×18505435204² (a number of 21 digits) 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, 898777 + ... + 919135.

It is an arithmetic number, because the mean of its divisors is an integer number (1428905520).

Almost surely, 2^18505435204 is an apocalyptic number.

It is an amenable number.

18505435204 is a deficient number, since it is larger than the sum of its proper divisors (15788297276).

18505435204 is a wasteful number, since it uses less digits than its factorization.

18505435204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33747 (or 33745 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 18505435204 its reverse (40253450581), we get a palindrome (58758885785).

The spelling of 18505435204 in words is "eighteen billion, five hundred five million, four hundred thirty-five thousand, two hundred four".