20992089111 has 8 divisors (see below), whose sum is σ = 31987945344. Its totient is φ = 11995479480.

The previous prime is 20992089101. The next prime is 20992089127. The reversal of 20992089111 is 11198029902.

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

It is not a de Polignac number, because 20992089111 - 2⁶ = 20992089047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992089101) 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 7 ways as a sum of consecutive naturals, for example, 499811625 + ... + 499811666.

It is an arithmetic number, because the mean of its divisors is an integer number (3998493168).

Almost surely, 2^20992089111 is an apocalyptic number.

20992089111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20992089111 is a deficient number, since it is larger than the sum of its proper divisors (10995856233).

20992089111 is an equidigital number, since it uses as much as digits as its factorization.

20992089111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999623301.

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 20992089111 in words is "twenty billion, nine hundred ninety-two million, eighty-nine thousand, one hundred eleven".