20485753 has 8 divisors (see below), whose sum is σ = 21279240. Its totient is φ = 19704960.

The previous prime is 20485739. The next prime is 20485757. The reversal of 20485753 is 35758402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 522729 + 19963024 = 723^2 + 4468^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20485753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20485757) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 183 + ... + 6403.

It is an arithmetic number, because the mean of its divisors is an integer number (2659905).

Almost surely, 2^20485753 is an apocalyptic number.

It is an amenable number.

20485753 is a deficient number, since it is larger than the sum of its proper divisors (793487).

20485753 is an equidigital number, since it uses as much as digits as its factorization.

20485753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6347.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 20485753 is about 4526.1189776673. The cubic root of 20485753 is about 273.6217675376.

The spelling of 20485753 in words is "twenty million, four hundred eighty-five thousand, seven hundred fifty-three".