99820418038660 has 192 divisors, whose sum is σ = 239997503176704. Its totient is φ = 34553008857600.

The previous prime is 99820418038637. The next prime is 99820418038673. The reversal of 99820418038660 is 6683081402899.

It is a junction number, because it is equal to n+sod(n) for n = 99820418038592 and 99820418038601.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68871645 + ... + 70306075.

It is an arithmetic number, because the mean of its divisors is an integer number (1249986995712).

Almost surely, 2^{99820418038660} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99820418038660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119998751588352).

99820418038660 is an abundant number, since it is smaller than the sum of its proper divisors (140177085138044).

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

99820418038660 is a wasteful number, since it uses less digits than its factorization.

99820418038660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434674 (or 1434672 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 64.

The spelling of 99820418038660 in words is "ninety-nine trillion, eight hundred twenty billion, four hundred eighteen million, thirty-eight thousand, six hundred sixty".