204720236136 has 384 divisors, whose sum is σ = 648733536000. Its totient is φ = 59672650752.

The previous prime is 204720236057. The next prime is 204720236153. The reversal of 204720236136 is 631632027402.

204720236136 is a `hidden beast` number, since 20 + 47 + 202 + 361 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 204720236136.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 91514410 + ... + 91516646.

It is an arithmetic number, because the mean of its divisors is an integer number (1689410250).

Almost surely, 2^204720236136 is an apocalyptic number.

204720236136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204720236136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324366768000).

204720236136 is an abundant number, since it is smaller than the sum of its proper divisors (444013299864).

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

204720236136 is a wasteful number, since it uses less digits than its factorization.

204720236136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2387 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The spelling of 204720236136 in words is "two hundred four billion, seven hundred twenty million, two hundred thirty-six thousand, one hundred thirty-six".