99821924305 has 4 divisors (see below), whose sum is σ = 119786309172. Its totient is φ = 79857539440.

The previous prime is 99821924303. The next prime is 99821924311. The reversal of 99821924305 is 50342912899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50342912899 = 499 ⋅100887601.

It can be written as a sum of positive squares in 2 ways, for example, as 56464690129 + 43357234176 = 237623^2 + 208224^2 .

It is not a de Polignac number, because 99821924305 - 2¹ = 99821924303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99821924303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9982192426 + ... + 9982192435.

It is an arithmetic number, because the mean of its divisors is an integer number (29946577293).

Almost surely, 2^99821924305 is an apocalyptic number.

It is an amenable number.

99821924305 is a deficient number, since it is larger than the sum of its proper divisors (19964384867).

99821924305 is a wasteful number, since it uses less digits than its factorization.

99821924305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19964384866.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 99821924305 in words is "ninety-nine billion, eight hundred twenty-one million, nine hundred twenty-four thousand, three hundred five".