99920001811 has 16 divisors (see below), whose sum is σ = 115476480000. Its totient is φ = 84689231328.

The previous prime is 99920001803. The next prime is 99920001817. The reversal of 99920001811 is 11810002999.

It is a cyclic number.

It is not a de Polignac number, because 99920001811 - 2³ = 99920001803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99920001817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17790 + ... + 447388.

It is an arithmetic number, because the mean of its divisors is an integer number (7217280000).

Almost surely, 2^99920001811 is an apocalyptic number.

99920001811 is a deficient number, since it is larger than the sum of its proper divisors (15556478189).

99920001811 is a wasteful number, since it uses less digits than its factorization.

99920001811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429978.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 99920001811 in words is "ninety-nine billion, nine hundred twenty million, one thousand, eight hundred eleven".