20291911099 has 8 divisors (see below), whose sum is σ = 21364154640. Its totient is φ = 19220092416.

The previous prime is 20291911049. The next prime is 20291911109. The reversal of 20291911099 is 99011919202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20291911099 - 2¹⁷ = 20291780027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20291911049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5722 + ... + 201535.

It is an arithmetic number, because the mean of its divisors is an integer number (2670519330).

Almost surely, 2^20291911099 is an apocalyptic number.

20291911099 is a deficient number, since it is larger than the sum of its proper divisors (1072243541).

20291911099 is a wasteful number, since it uses less digits than its factorization.

20291911099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212429.

The product of its (nonzero) digits is 26244, while the sum is 43.

The spelling of 20291911099 in words is "twenty billion, two hundred ninety-one million, nine hundred eleven thousand, ninety-nine".