20134103612640 has 192 divisors, whose sum is σ = 63899835310080. Its totient is φ = 5328806952960.

The previous prime is 20134103612549. The next prime is 20134103612659. The reversal of 20134103612640 is 4621630143102.

It is a happy number.

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, 39997392 + ... + 40497648.

It is an arithmetic number, because the mean of its divisors is an integer number (332811642240).

Almost surely, 2^{20134103612640} is an apocalyptic number.

20134103612640 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 20134103612640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31949917655040).

20134103612640 is an abundant number, since it is smaller than the sum of its proper divisors (43765731697440).

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

20134103612640 is a wasteful number, since it uses less digits than its factorization.

20134103612640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500905 (or 500897 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 20134103612640 its reverse (4621630143102), we get a palindrome (24755733755742).

The spelling of 20134103612640 in words is "twenty trillion, one hundred thirty-four billion, one hundred three million, six hundred twelve thousand, six hundred forty".