20743075 has 6 divisors (see below), whose sum is σ = 25721444. Its totient is φ = 16594440.

The previous prime is 20743039. The next prime is 20743081. The reversal of 20743075 is 57034702.

It is not a de Polignac number, because 20743075 - 2⁹ = 20742563 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 414837 + ... + 414886.

Almost surely, 2^20743075 is an apocalyptic number.

20743075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20743075 is a deficient number, since it is larger than the sum of its proper divisors (4978369).

20743075 is an equidigital number, since it uses as much as digits as its factorization.

20743075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829733 (or 829728 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20743075 is about 4554.4566086417. The cubic root of 20743075 is about 274.7626602357.

Adding to 20743075 its reverse (57034702), we get a palindrome (77777777).

The spelling of 20743075 in words is "twenty million, seven hundred forty-three thousand, seventy-five".