20323485 has 72 divisors (see below), whose sum is σ = 44193240. Its totient is φ = 8563968.

The previous prime is 20323453. The next prime is 20323487. The reversal of 20323485 is 58432302.

It can be written as a sum of positive squares in 4 ways, for example, as 127449 + 20196036 = 357^2 + 4494^2 .

It is not a de Polignac number, because 20323485 - 2⁵ = 20323453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323487) 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 71 ways as a sum of consecutive naturals, for example, 28311 + ... + 29019.

It is an arithmetic number, because the mean of its divisors is an integer number (613795).

Almost surely, 2^20323485 is an apocalyptic number.

It is an amenable number.

20323485 is an abundant number, since it is smaller than the sum of its proper divisors (23869755).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20323485 is a wasteful number, since it uses less digits than its factorization.

20323485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20323485 is about 4508.1576059406. The cubic root of 20323485 is about 272.8973973407.

Adding to 20323485 its reverse (58432302), we get a palindrome (78755787).

The spelling of 20323485 in words is "twenty million, three hundred twenty-three thousand, four hundred eighty-five".