1020730889213 has 6 divisors (see below), whose sum is σ = 1187380830366. Its totient is φ = 874912190712.

The previous prime is 1020730889207. The next prime is 1020730889261. The reversal of 1020730889213 is 3129880370201.

It can be written as a sum of positive squares in only one way, i.e., 815269943929 + 205460945284 = 902923^2 + 453278^2 .

It is not a de Polignac number, because 1020730889213 - 2¹² = 1020730885117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020730889293) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10415621270 + ... + 10415621367.

It is an arithmetic number, because the mean of its divisors is an integer number (197896805061).

Almost surely, 2^{1020730889213} is an apocalyptic number.

It is an amenable number.

1020730889213 is a deficient number, since it is larger than the sum of its proper divisors (166649941153).

1020730889213 is an equidigital number, since it uses as much as digits as its factorization.

1020730889213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20831242651 (or 20831242644 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 1020730889213 in words is "one trillion, twenty billion, seven hundred thirty million, eight hundred eighty-nine thousand, two hundred thirteen".