20641333020 has 384 divisors, whose sum is σ = 76657674240. Its totient is φ = 4017684480.

The previous prime is 20641333019. The next prime is 20641333021. The reversal of 20641333020 is 2033314602.

It is an interprime number because it is at equal distance from previous prime (20641333019) and next prime (20641333021).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641333021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21126772 + ... + 21127748.

It is an arithmetic number, because the mean of its divisors is an integer number (199629360).

Almost surely, 2^20641333020 is an apocalyptic number.

20641333020 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 20641333020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38328837120).

20641333020 is an abundant number, since it is smaller than the sum of its proper divisors (56016341220).

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

20641333020 is a wasteful number, since it uses less digits than its factorization.

20641333020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1291 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 20641333020 its reverse (2033314602), we get a palindrome (22674647622).

The spelling of 20641333020 in words is "twenty billion, six hundred forty-one million, three hundred thirty-three thousand, twenty".