1020858509983 has 16 divisors (see below), whose sum is σ = 1140797661696. Its totient is φ = 907452614880.

The previous prime is 1020858509819. The next prime is 1020858510103. The reversal of 1020858509983 is 3899058580201.

It is a cyclic number.

It is not a de Polignac number, because 1020858509983 - 2¹³ = 1020858501791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020858509183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12821035 + ... + 12900412.

It is an arithmetic number, because the mean of its divisors is an integer number (71299853856).

Almost surely, 2^{1020858509983} is an apocalyptic number.

1020858509983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1020858509983 is a deficient number, since it is larger than the sum of its proper divisors (119939151713).

1020858509983 is a wasteful number, since it uses less digits than its factorization.

1020858509983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25721574.

The product of its (nonzero) digits is 6220800, while the sum is 58.

The spelling of 1020858509983 in words is "one trillion, twenty billion, eight hundred fifty-eight million, five hundred nine thousand, nine hundred eighty-three".