20611113204 has 48 divisors (see below), whose sum is σ = 52483951296. Its totient is φ = 6243494400.

The previous prime is 20611113203. The next prime is 20611113209. The reversal of 20611113204 is 40231111602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20611113203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350364 + ... + 404940.

It is an arithmetic number, because the mean of its divisors is an integer number (1093415652).

Almost surely, 2^20611113204 is an apocalyptic number.

It is an amenable number.

20611113204 is an abundant number, since it is smaller than the sum of its proper divisors (31872838092).

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

20611113204 is a wasteful number, since it uses less digits than its factorization.

20611113204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57456 (or 57454 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20611113204 its reverse (40231111602), we get a palindrome (60842224806).

The spelling of 20611113204 in words is "twenty billion, six hundred eleven million, one hundred thirteen thousand, two hundred four".