20310485 has 8 divisors (see below), whose sum is σ = 26247480. Its totient is φ = 14998464.

The previous prime is 20310481. The next prime is 20310497. The reversal of 20310485 is 58401302.

It can be written as a sum of positive squares in 4 ways, for example, as 1012036 + 19298449 = 1006^2 + 4393^2 .

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

It is not a de Polignac number, because 20310485 - 2² = 20310481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20310485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156170 + ... + 156299.

It is an arithmetic number, because the mean of its divisors is an integer number (3280935).

Almost surely, 2^20310485 is an apocalyptic number.

It is an amenable number.

20310485 is a deficient number, since it is larger than the sum of its proper divisors (5936995).

20310485 is a wasteful number, since it uses less digits than its factorization.

20310485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312487.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20310485 is about 4506.7155446067. The cubic root of 20310485 is about 272.8391982858.

Adding to 20310485 its reverse (58401302), we get a palindrome (78711787).

The spelling of 20310485 in words is "twenty million, three hundred ten thousand, four hundred eighty-five".