20204075 has 24 divisors (see below), whose sum is σ = 26797392. Its totient is φ = 15057920.

The previous prime is 20204071. The next prime is 20204081. The reversal of 20204075 is 57040202.

It is not a de Polignac number, because 20204075 - 2² = 20204071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20204071) 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 23 ways as a sum of consecutive naturals, for example, 58052 + ... + 58398.

It is an arithmetic number, because the mean of its divisors is an integer number (1116558).

Almost surely, 2^20204075 is an apocalyptic number.

20204075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20204075 is a deficient number, since it is larger than the sum of its proper divisors (6593317).

20204075 is a wasteful number, since it uses less digits than its factorization.

20204075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20204075 is about 4494.8943257879. The cubic root of 20204075 is about 272.3618804576.

Adding to 20204075 its reverse (57040202), we get a palindrome (77244277).

The spelling of 20204075 in words is "twenty million, two hundred four thousand, seventy-five".