20351645103064 has 128 divisors (see below), whose sum is σ = 43406804828160. Its totient is φ = 8861630400000.

The previous prime is 20351645103047. The next prime is 20351645103077. The reversal of 20351645103064 is 46030154615302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2185758969 + ... + 2185768279.

It is an arithmetic number, because the mean of its divisors is an integer number (339115662720).

Almost surely, 2^{20351645103064} 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 20351645103064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21703402414080).

20351645103064 is an abundant number, since it is smaller than the sum of its proper divisors (23055159725096).

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

20351645103064 is a wasteful number, since it uses less digits than its factorization.

20351645103064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17393 (or 17389 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

Adding to 20351645103064 its reverse (46030154615302), we get a palindrome (66381799718366).

The spelling of 20351645103064 in words is "twenty trillion, three hundred fifty-one billion, six hundred forty-five million, one hundred three thousand, sixty-four".