20611340244 has 144 divisors (see below), whose sum is σ = 60941307840. Its totient is φ = 5974119360.

The previous prime is 20611340219. The next prime is 20611340249. The reversal of 20611340244 is 44204311602.

It is a happy number.

20611340244 is a `hidden beast` number, since 2 + 0 + 611 + 3 + 4 + 0 + 2 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20611340249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 612054 + ... + 644850.

Almost surely, 2^20611340244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20611340244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30470653920).

20611340244 is an abundant number, since it is smaller than the sum of its proper divisors (40329967596).

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

20611340244 is a wasteful number, since it uses less digits than its factorization.

20611340244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32867 (or 32836 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 20611340244 its reverse (44204311602), we get a palindrome (64815651846).

The spelling of 20611340244 in words is "twenty billion, six hundred eleven million, three hundred forty thousand, two hundred forty-four".