18201618534 has 32 divisors (see below), whose sum is σ = 40076974080. Its totient is φ = 5465037600.

The previous prime is 18201618527. The next prime is 18201618541. The reversal of 18201618534 is 43581610281.

It is an interprime number because it is at equal distance from previous prime (18201618527) and next prime (18201618541).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18201618492 and 18201618501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1257862 + ... + 1272249.

It is an arithmetic number, because the mean of its divisors is an integer number (1252405440).

Almost surely, 2^18201618534 is an apocalyptic number.

18201618534 is an abundant number, since it is smaller than the sum of its proper divisors (21875355546).

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

18201618534 is a wasteful number, since it uses less digits than its factorization.

18201618534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530236.

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 18201618534 in words is "eighteen billion, two hundred one million, six hundred eighteen thousand, five hundred thirty-four".