20331016654813 has 2 divisors, whose sum is σ = 20331016654814. Its totient is φ = 20331016654812.

The previous prime is 20331016654789. The next prime is 20331016654841. The reversal of 20331016654813 is 31845661013302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14779818869209 + 5551197785604 = 3844453^2 + 2356098^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331016654813 - 2³³ = 20322426720221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20331016654813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20331014654813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165508327406 + 10165508327407.

It is an arithmetic number, because the mean of its divisors is an integer number (10165508327407).

Almost surely, 2^{20331016654813} is an apocalyptic number.

It is an amenable number.

20331016654813 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331016654813 is an equidigital number, since it uses as much as digits as its factorization.

20331016654813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 20331016654813 in words is "twenty trillion, three hundred thirty-one billion, sixteen million, six hundred fifty-four thousand, eight hundred thirteen".