99948885021 has 12 divisors (see below), whose sum is σ = 145800025020. Its totient is φ = 65972860800.

The previous prime is 99948884999. The next prime is 99948885037. The reversal of 99948885021 is 12058884999.

99948885021 is a `hidden beast` number, since 9 + 9 + 9 + 48 + 88 + 502 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 97087704921 + 2861180100 = 311589^2 + 53490^2 .

It is not a de Polignac number, because 99948885021 - 2⁶ = 99948884957 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 99948885021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99948885061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54976476 + ... + 54978293.

It is an arithmetic number, because the mean of its divisors is an integer number (12150002085).

Almost surely, 2^99948885021 is an apocalyptic number.

It is an amenable number.

99948885021 is a deficient number, since it is larger than the sum of its proper divisors (45851139999).

99948885021 is a wasteful number, since it uses less digits than its factorization.

99948885021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109954876 (or 109954873 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 63.

The spelling of 99948885021 in words is "ninety-nine billion, nine hundred forty-eight million, eight hundred eighty-five thousand, twenty-one".