20485111 has 4 divisors (see below), whose sum is σ = 21375792. Its totient is φ = 19594432.

The previous prime is 20485109. The next prime is 20485121. The reversal of 20485111 is 11158402.

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

It is a cyclic number.

It is not a de Polignac number, because 20485111 - 2¹ = 20485109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20485121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445306 + ... + 445351.

It is an arithmetic number, because the mean of its divisors is an integer number (5343948).

Almost surely, 2^20485111 is an apocalyptic number.

20485111 is a deficient number, since it is larger than the sum of its proper divisors (890681).

20485111 is an equidigital number, since it uses as much as digits as its factorization.

20485111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890680.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 20485111 is about 4526.0480554232. The cubic root of 20485111 is about 273.6189091770.

The spelling of 20485111 in words is "twenty million, four hundred eighty-five thousand, one hundred eleven".