204002020401 has 4 divisors (see below), whose sum is σ = 272002693872. Its totient is φ = 136001346932.

The previous prime is 204002020381. The next prime is 204002020423. The reversal of 204002020401 is 104020200402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204002020401 - 2⁶ = 204002020337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204002020451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34000336731 + ... + 34000336736.

It is an arithmetic number, because the mean of its divisors is an integer number (68000673468).

Almost surely, 2^204002020401 is an apocalyptic number.

It is an amenable number.

204002020401 is a deficient number, since it is larger than the sum of its proper divisors (68000673471).

204002020401 is an equidigital number, since it uses as much as digits as its factorization.

204002020401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68000673470.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 204002020401 its reverse (104020200402), we get a palindrome (308022220803).

The spelling of 204002020401 in words is "two hundred four billion, two million, twenty thousand, four hundred one".