99489482820 has 576 divisors, whose sum is σ = 387271213056. Its totient is φ = 20877626880.

The previous prime is 99489482777. The next prime is 99489482821. The reversal of 99489482820 is 2828498499.

99489482820 is a `hidden beast` number, since 99 + 48 + 9 + 482 + 8 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (99489482821) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 100392525 + ... + 100393515.

It is an arithmetic number, because the mean of its divisors is an integer number (672345856).

Almost surely, 2^99489482820 is an apocalyptic number.

99489482820 is a gapful number since it is divisible by the number (90) 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 99489482820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193635606528).

99489482820 is an abundant number, since it is smaller than the sum of its proper divisors (287781730236).

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

99489482820 is a wasteful number, since it uses less digits than its factorization.

99489482820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 63.

The spelling of 99489482820 in words is "ninety-nine billion, four hundred eighty-nine million, four hundred eighty-two thousand, eight hundred twenty".