18681310535 has 8 divisors (see below), whose sum is σ = 22427041776. Its totient is φ = 14938735680.

The previous prime is 18681310513. The next prime is 18681310553. The reversal of 18681310535 is 53501318681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18681310535 - 2¹² = 18681306439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18681310492 and 18681310501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776054 + ... + 799763.

It is an arithmetic number, because the mean of its divisors is an integer number (2803380222).

Almost surely, 2^18681310535 is an apocalyptic number.

18681310535 is a deficient number, since it is larger than the sum of its proper divisors (3745731241).

18681310535 is a wasteful number, since it uses less digits than its factorization.

18681310535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578193.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 18681310535 in words is "eighteen billion, six hundred eighty-one million, three hundred ten thousand, five hundred thirty-five".