20336768208 has 120 divisors (see below), whose sum is σ = 58758776648. Its totient is φ = 6561202176.

The previous prime is 20336768203. The next prime is 20336768213. The reversal of 20336768208 is 80286763302.

20336768208 is a `hidden beast` number, since 20 + 3 + 367 + 68 + 208 = 666.

It is an interprime number because it is at equal distance from previous prime (20336768203) and next prime (20336768213).

It can be written as a sum of positive squares in 4 ways, for example, as 4138606224 + 16198161984 = 64332^2 + 127272^2 .

It is a super-2 number, since 2×20336768208² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20336768203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1018416 + ... + 1038192.

Almost surely, 2^20336768208 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 20336768208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29379388324).

20336768208 is an abundant number, since it is smaller than the sum of its proper divisors (38422008440).

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

20336768208 is a wasteful number, since it uses less digits than its factorization.

20336768208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20021 (or 20012 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

It can be divided in two parts, 20336 and 768208, that added together give a square (788544 = 888²).

The spelling of 20336768208 in words is "twenty billion, three hundred thirty-six million, seven hundred sixty-eight thousand, two hundred eight".