99813252820 has 12 divisors (see below), whose sum is σ = 209607830964. Its totient is φ = 39925301120.

The previous prime is 99813252817. The next prime is 99813252827. The reversal of 99813252820 is 2825231899.

It can be written as a sum of positive squares in 2 ways, for example, as 41165975236 + 58647277584 = 202894^2 + 242172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99813252827) 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, 2495331301 + ... + 2495331340.

It is an arithmetic number, because the mean of its divisors is an integer number (17467319247).

Almost surely, 2^99813252820 is an apocalyptic number.

It is an amenable number.

99813252820 is an abundant number, since it is smaller than the sum of its proper divisors (109794578144).

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

99813252820 is a wasteful number, since it uses less digits than its factorization.

99813252820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990662650 (or 4990662648 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 99813252820 in words is "ninety-nine billion, eight hundred thirteen million, two hundred fifty-two thousand, eight hundred twenty".