204993769428 has 36 divisors (see below), whose sum is σ = 592204223520. Its totient is φ = 58569648336.

The previous prime is 204993769427. The next prime is 204993769441. The reversal of 204993769428 is 824967399402.

204993769428 is a `hidden beast` number, since 2 + 0 + 499 + 37 + 6 + 94 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204993769423) 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 11 ways as a sum of consecutive naturals, for example, 406733418 + ... + 406733921.

It is an arithmetic number, because the mean of its divisors is an integer number (16450117320).

Almost surely, 2^204993769428 is an apocalyptic number.

204993769428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

204993769428 is an abundant number, since it is smaller than the sum of its proper divisors (387210454092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204993769428 is a wasteful number, since it uses less digits than its factorization.

204993769428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813467356 (or 813467351 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 204993769428 in words is "two hundred four billion, nine hundred ninety-three million, seven hundred sixty-nine thousand, four hundred twenty-eight".