20502143035550 has 96 divisors (see below), whose sum is σ = 41652809656704. Its totient is φ = 7445993744000.

The previous prime is 20502143035531. The next prime is 20502143035559. The reversal of 20502143035550 is 5553034120502.

It is a self number, because there is not a number n which added to its sum of digits gives 20502143035550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20502143035559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2275230545 + ... + 2275239555.

It is an arithmetic number, because the mean of its divisors is an integer number (433883433924).

Almost surely, 2^{20502143035550} is an apocalyptic number.

20502143035550 is an abundant number, since it is smaller than the sum of its proper divisors (21150666621154).

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

20502143035550 is a wasteful number, since it uses less digits than its factorization.

20502143035550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13754 (or 13749 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 20502143035550 in words is "twenty trillion, five hundred two billion, one hundred forty-three million, thirty-five thousand, five hundred fifty".