20340622352256 has 128 divisors (see below), whose sum is σ = 54154971131040. Its totient is φ = 6764515000320.

The previous prime is 20340622352221. The next prime is 20340622352317. The reversal of 20340622352256 is 65225322604302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295988556 + ... + 296057268.

Almost surely, 2^{20340622352256} 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 20340622352256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27077485565520).

20340622352256 is an abundant number, since it is smaller than the sum of its proper divisors (33814348778784).

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

20340622352256 is a wasteful number, since it uses less digits than its factorization.

20340622352256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70504 (or 70492 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 42.

Adding to 20340622352256 its reverse (65225322604302), we get a palindrome (85565944956558).

The spelling of 20340622352256 in words is "twenty trillion, three hundred forty billion, six hundred twenty-two million, three hundred fifty-two thousand, two hundred fifty-six".