20036668336837 has 2 divisors, whose sum is σ = 20036668336838. Its totient is φ = 20036668336836.

The previous prime is 20036668336823. The next prime is 20036668336843. The reversal of 20036668336837 is 73863386663002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19987328376961 + 49339959876 = 4470719^2 + 222126^2 .

It is a cyclic number.

It is not a de Polignac number, because 20036668336837 - 2⁷ = 20036668336709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20036668336537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10018334168418 + 10018334168419.

It is an arithmetic number, because the mean of its divisors is an integer number (10018334168419).

Almost surely, 2^{20036668336837} is an apocalyptic number.

It is an amenable number.

20036668336837 is a deficient number, since it is larger than the sum of its proper divisors (1).

20036668336837 is an equidigital number, since it uses as much as digits as its factorization.

20036668336837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94058496, while the sum is 61.

The spelling of 20036668336837 in words is "twenty trillion, thirty-six billion, six hundred sixty-eight million, three hundred thirty-six thousand, eight hundred thirty-seven".