18090659433798 has 192 divisors, whose sum is σ = 48407101562880. Its totient is φ = 4989461270976.

The previous prime is 18090659433797. The next prime is 18090659433907. The reversal of 18090659433798 is 89733495609081.

18090659433798 is a `hidden beast` number, since 1 + 80 + 90 + 6 + 5 + 94 + 3 + 379 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090659433797) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 11706061 + ... + 13161047.

It is an arithmetic number, because the mean of its divisors is an integer number (252120320640).

Almost surely, 2^{18090659433798} is an apocalyptic number.

18090659433798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18090659433798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24203550781440).

18090659433798 is an abundant number, since it is smaller than the sum of its proper divisors (30316442129082).

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

18090659433798 is a wasteful number, since it uses less digits than its factorization.

18090659433798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455176 (or 1455163 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 72.

The spelling of 18090659433798 in words is "eighteen trillion, ninety billion, six hundred fifty-nine million, four hundred thirty-three thousand, seven hundred ninety-eight".