99473468821 has 4 divisors (see below), whose sum is σ = 103798402272. Its totient is φ = 95148535372.

The previous prime is 99473468803. The next prime is 99473468869. The reversal of 99473468821 is 12886437499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99473468821 - 2¹⁵ = 99473436053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99473468821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99473468021) 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, 2162466691 + ... + 2162466736.

It is an arithmetic number, because the mean of its divisors is an integer number (25949600568).

Almost surely, 2^99473468821 is an apocalyptic number.

It is an amenable number.

99473468821 is a deficient number, since it is larger than the sum of its proper divisors (4324933451).

99473468821 is a wasteful number, since it uses less digits than its factorization.

99473468821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324933450.

The product of its digits is 20901888, while the sum is 61.

The spelling of 99473468821 in words is "ninety-nine billion, four hundred seventy-three million, four hundred sixty-eight thousand, eight hundred twenty-one".