20211099985 has 8 divisors (see below), whose sum is σ = 24257439360. Its totient is φ = 16166133744.

The previous prime is 20211099973. The next prime is 20211099989. The reversal of 20211099985 is 58999011202.

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 20211099985 - 2¹¹ = 20211097937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20211099989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310617 + ... + 370006.

It is an arithmetic number, because the mean of its divisors is an integer number (3032179920).

Almost surely, 2^20211099985 is an apocalyptic number.

It is an amenable number.

20211099985 is a deficient number, since it is larger than the sum of its proper divisors (4046339375).

20211099985 is an equidigital number, since it uses as much as digits as its factorization.

20211099985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686567.

The product of its (nonzero) digits is 116640, while the sum is 46.

The spelling of 20211099985 in words is "twenty billion, two hundred eleven million, ninety-nine thousand, nine hundred eighty-five".