99061820 has 96 divisors (see below), whose sum is σ = 257402880. Its totient is φ = 31484160.

The previous prime is 99061817. The next prime is 99061829. The reversal of 99061820 is 2816099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99061829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53429 + ... + 55251.

It is an arithmetic number, because the mean of its divisors is an integer number (2681280).

Almost surely, 2^99061820 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 99061820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128701440).

99061820 is an abundant number, since it is smaller than the sum of its proper divisors (158341060).

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

99061820 is a wasteful number, since it uses less digits than its factorization.

99061820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875 (or 1873 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 99061820 is about 9952.9804581341. The cubic root of 99061820 is about 462.7027715690.

The spelling of 99061820 in words is "ninety-nine million, sixty-one thousand, eight hundred twenty".