20320475 has 24 divisors (see below), whose sum is σ = 29164800. Its totient is φ = 13756320.

The previous prime is 20320463. The next prime is 20320483. The reversal of 20320475 is 57402302.

It is not a de Polignac number, because 20320475 - 2¹⁴ = 20304091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20320475.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13826 + ... + 15224.

It is an arithmetic number, because the mean of its divisors is an integer number (1215200).

Almost surely, 2^20320475 is an apocalyptic number.

20320475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20320475 is a deficient number, since it is larger than the sum of its proper divisors (8844325).

20320475 is a wasteful number, since it uses less digits than its factorization.

20320475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499 (or 1494 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20320475 is about 4507.8237543187. The cubic root of 20320475 is about 272.8839242295.

Adding to 20320475 its reverse (57402302), we get a palindrome (77722777).

The spelling of 20320475 in words is "twenty million, three hundred twenty thousand, four hundred seventy-five".