2011205504 has 64 divisors (see below), whose sum is σ = 4995388800. Its totient is φ = 783582720.

The previous prime is 2011205473. The next prime is 2011205509. The reversal of 2011205504 is 4055021102.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011205509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92174 + ... + 111885.

It is an arithmetic number, because the mean of its divisors is an integer number (78052950).

Almost surely, 2^2011205504 is an apocalyptic number.

It is an amenable number.

2011205504 is an abundant number, since it is smaller than the sum of its proper divisors (2984183296).

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

2011205504 is a wasteful number, since it uses less digits than its factorization.

2011205504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204091 (or 204079 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2011205504 is about 44846.4659031233. The cubic root of 2011205504 is about 1262.2696774755.

Adding to 2011205504 its reverse (4055021102), we get a palindrome (6066226606).

The spelling of 2011205504 in words is "two billion, eleven million, two hundred five thousand, five hundred four".