18136434406580 has 192 divisors, whose sum is σ = 48545505792000. Its totient is φ = 5663640084480.

The previous prime is 18136434406513. The next prime is 18136434406589. The reversal of 18136434406580 is 8560443463181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18136434406589) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1106876 + ... + 6123564.

It is an arithmetic number, because the mean of its divisors is an integer number (252841176000).

Almost surely, 2^{18136434406580} is an apocalyptic number.

18136434406580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18136434406580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24272752896000).

18136434406580 is an abundant number, since it is smaller than the sum of its proper divisors (30409071385420).

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

18136434406580 is a wasteful number, since it uses less digits than its factorization.

18136434406580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016767 (or 5016751 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 53.

The spelling of 18136434406580 in words is "eighteen trillion, one hundred thirty-six billion, four hundred thirty-four million, four hundred six thousand, five hundred eighty".