204333618989 has 4 divisors (see below), whose sum is σ = 204335629824. Its totient is φ = 204331608156.

The previous prime is 204333618971. The next prime is 204333619069. The reversal of 204333618989 is 989816333402.

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 204333618989 - 2⁸ = 204333618733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204333618919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844397 + ... + 1059090.

It is an arithmetic number, because the mean of its divisors is an integer number (51083907456).

Almost surely, 2^204333618989 is an apocalyptic number.

It is an amenable number.

204333618989 is a deficient number, since it is larger than the sum of its proper divisors (2010835).

204333618989 is a wasteful number, since it uses less digits than its factorization.

204333618989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010834.

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 204333618989 in words is "two hundred four billion, three hundred thirty-three million, six hundred eighteen thousand, nine hundred eighty-nine".