99019992819 has 16 divisors (see below), whose sum is σ = 148995601920. Its totient is φ = 57942732960.

The previous prime is 99019992767. The next prime is 99019992823. The reversal of 99019992819 is 91829991099.

It is a happy number.

It is not a de Polignac number, because 99019992819 - 2⁹ = 99019992307 is a prime.

It is a super-2 number, since 2×99019992819² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99019992819.

It is not an unprimeable number, because it can be changed into a prime (99019990819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51733627 + ... + 51735540.

It is an arithmetic number, because the mean of its divisors is an integer number (9312225120).

Almost surely, 2^99019992819 is an apocalyptic number.

99019992819 is a deficient number, since it is larger than the sum of its proper divisors (49975609101).

99019992819 is a wasteful number, since it uses less digits than its factorization.

99019992819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103469210.

The product of its (nonzero) digits is 8503056, while the sum is 66.

The spelling of 99019992819 in words is "ninety-nine billion, nineteen million, nine hundred ninety-two thousand, eight hundred nineteen".