20431675 has 12 divisors (see below), whose sum is σ = 27638856. Its totient is φ = 14859200.

The previous prime is 20431673. The next prime is 20431679. The reversal of 20431675 is 57613402.

It is not a de Polignac number, because 20431675 - 2¹ = 20431673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20431673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36874 + ... + 37423.

It is an arithmetic number, because the mean of its divisors is an integer number (2303238).

Almost surely, 2^20431675 is an apocalyptic number.

20431675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20431675 is a deficient number, since it is larger than the sum of its proper divisors (7207181).

20431675 is a wasteful number, since it uses less digits than its factorization.

20431675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74318 (or 74313 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20431675 is about 4520.1410376226. The cubic root of 20431675 is about 273.3807877486.

The spelling of 20431675 in words is "twenty million, four hundred thirty-one thousand, six hundred seventy-five".