20110985 has 4 divisors (see below), whose sum is σ = 24133188. Its totient is φ = 16088784.

The previous prime is 20110969. The next prime is 20110991. The reversal of 20110985 is 58901102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10426441 + 9684544 = 3229^2 + 3112^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110985 - 2⁴ = 20110969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011094 + ... + 2011103.

It is an arithmetic number, because the mean of its divisors is an integer number (6033297).

Almost surely, 2^20110985 is an apocalyptic number.

It is an amenable number.

20110985 is a deficient number, since it is larger than the sum of its proper divisors (4022203).

20110985 is an equidigital number, since it uses as much as digits as its factorization.

20110985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022202.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 20110985 is about 4484.5272883549. The cubic root of 20110985 is about 271.9429351525.

The spelling of 20110985 in words is "twenty million, one hundred ten thousand, nine hundred eighty-five".