1020339621888 has 416 divisors, whose sum is σ = 2934530463744. Its totient is φ = 314524041216.

The previous prime is 1020339621883. The next prime is 1020339621901. The reversal of 1020339621888 is 8881269330201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020339621888.

It is not an unprimeable number, because it can be changed into a prime (1020339621883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1373269645 + ... + 1373270387.

Almost surely, 2^{1020339621888} 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 1020339621888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1467265231872).

1020339621888 is an abundant number, since it is smaller than the sum of its proper divisors (1914190841856).

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

1020339621888 is a wasteful number, since it uses less digits than its factorization.

1020339621888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 1020339621888 in words is "one trillion, twenty billion, three hundred thirty-nine million, six hundred twenty-one thousand, eight hundred eighty-eight".