204381097784 has 64 divisors (see below), whose sum is σ = 400248838080. Its totient is φ = 97748352000.

The previous prime is 204381097783. The next prime is 204381097813. The reversal of 204381097784 is 487790183402.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204381097783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31826894 + ... + 31833314.

It is an arithmetic number, because the mean of its divisors is an integer number (6253888095).

Almost surely, 2^204381097784 is an apocalyptic number.

It is an amenable number.

204381097784 is a deficient number, since it is larger than the sum of its proper divisors (195867740296).

204381097784 is a wasteful number, since it uses less digits than its factorization.

204381097784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8352 (or 8348 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 204381097784 in words is "two hundred four billion, three hundred eighty-one million, ninety-seven thousand, seven hundred eighty-four".