20135745550550 has 192 divisors, whose sum is σ = 46380775440384. Its totient is φ = 6352227446400.

The previous prime is 20135745550549. The next prime is 20135745550603. The reversal of 20135745550550 is 5505554753102.

It is a junction number, because it is equal to n+sod(n) for n = 20135745550495 and 20135745550504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 41433269 + ... + 41916431.

It is an arithmetic number, because the mean of its divisors is an integer number (241566538752).

Almost surely, 2^{20135745550550} is an apocalyptic number.

20135745550550 is an abundant number, since it is smaller than the sum of its proper divisors (26245029889834).

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

20135745550550 is a wasteful number, since it uses less digits than its factorization.

20135745550550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483403 (or 483398 counting only the distinct ones).

The product of its (nonzero) digits is 2625000, while the sum is 47.

The spelling of 20135745550550 in words is "twenty trillion, one hundred thirty-five billion, seven hundred forty-five million, five hundred fifty thousand, five hundred fifty".