204210011240 has 64 divisors (see below), whose sum is σ = 469200729600. Its totient is φ = 79961519872.

The previous prime is 204210011209. The next prime is 204210011261. The reversal of 204210011240 is 42110012402.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 830441 + ... + 1047879.

It is an arithmetic number, because the mean of its divisors is an integer number (7331261400).

Almost surely, 2^204210011240 is an apocalyptic number.

204210011240 is a gapful number since it is divisible by the number (20) 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 204210011240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234600364800).

204210011240 is an abundant number, since it is smaller than the sum of its proper divisors (264990718360).

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

204210011240 is a wasteful number, since it uses less digits than its factorization.

204210011240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217946 (or 217942 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 204210011240 its reverse (42110012402), we get a palindrome (246320023642).

The spelling of 204210011240 in words is "two hundred four billion, two hundred ten million, eleven thousand, two hundred forty".