205000004 has 48 divisors (see below), whose sum is σ = 400038912. Its totient is φ = 91140000.

The previous prime is 205000001. The next prime is 205000007. The reversal of 205000004 is 400000502.

It is an interprime number because it is at equal distance from previous prime (205000001) and next prime (205000007).

It is a Harshad number since it is a multiple of its sum of digits (11).

It is not an unprimeable number, because it can be changed into a prime (205000001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 659009 + ... + 659319.

It is an arithmetic number, because the mean of its divisors is an integer number (8334144).

Almost surely, 2^205000004 is an apocalyptic number.

It is an amenable number.

205000004 is a deficient number, since it is larger than the sum of its proper divisors (195038908).

205000004 is a wasteful number, since it uses less digits than its factorization.

205000004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 205000004 is about 14317.8212029624. The cubic root of 205000004 is about 589.6368578321.

Adding to 205000004 its reverse (400000502), we get a palindrome (605000506).

The spelling of 205000004 in words is "two hundred five million, four", and thus it is an aban number.