20670540386737 has 2 divisors, whose sum is σ = 20670540386738. Its totient is φ = 20670540386736.

The previous prime is 20670540386723. The next prime is 20670540386747. The reversal of 20670540386737 is 73768304507602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16805400114721 + 3865140272016 = 4099439^2 + 1965996^2 .

It is a cyclic number.

It is not a de Polignac number, because 20670540386737 - 2¹⁹ = 20670539862449 is a prime.

It is not a weakly prime, because it can be changed into another prime (20670540386747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10335270193368 + 10335270193369.

It is an arithmetic number, because the mean of its divisors is an integer number (10335270193369).

Almost surely, 2^{20670540386737} is an apocalyptic number.

It is an amenable number.

20670540386737 is a deficient number, since it is larger than the sum of its proper divisors (1).

20670540386737 is an equidigital number, since it uses as much as digits as its factorization.

20670540386737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35562240, while the sum is 58.

The spelling of 20670540386737 in words is "twenty trillion, six hundred seventy billion, five hundred forty million, three hundred eighty-six thousand, seven hundred thirty-seven".