1020305255502 has 128 divisors (see below), whose sum is σ = 2334881783808. Its totient is φ = 294455347200.

The previous prime is 1020305255429. The next prime is 1020305255503. The reversal of 1020305255502 is 2055525030201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020305255502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020305255503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 693612627 + ... + 693614097.

It is an arithmetic number, because the mean of its divisors is an integer number (18241263936).

Almost surely, 2^{1020305255502} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020305255502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1167440891904).

1020305255502 is an abundant number, since it is smaller than the sum of its proper divisors (1314576528306).

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

1020305255502 is a wasteful number, since it uses less digits than its factorization.

1020305255502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954.

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 1020305255502 in words is "one trillion, twenty billion, three hundred five million, two hundred fifty-five thousand, five hundred two".