20243475 has 36 divisors (see below), whose sum is σ = 41441296. Its totient is φ = 9253440.

The previous prime is 20243471. The next prime is 20243501. The reversal of 20243475 is 57434202.

It is not a de Polignac number, because 20243475 - 2² = 20243471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20243471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4852 + ... + 8001.

Almost surely, 2^20243475 is an apocalyptic number.

20243475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20243475 is an abundant number, since it is smaller than the sum of its proper divisors (21197821).

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

20243475 is a wasteful number, since it uses less digits than its factorization.

20243475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12876 (or 12868 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 20243475 is about 4499.2749415878. The cubic root of 20243475 is about 272.5388099480.

Adding to 20243475 its reverse (57434202), we get a palindrome (77677677).

The spelling of 20243475 in words is "twenty million, two hundred forty-three thousand, four hundred seventy-five".