20702740046377 has 2 divisors, whose sum is σ = 20702740046378. Its totient is φ = 20702740046376.

The previous prime is 20702740046299. The next prime is 20702740046381. The reversal of 20702740046377 is 77364004720702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17788689616896 + 2914050429481 = 4217664^2 + 1707059^2 .

It is a cyclic number.

It is not a de Polignac number, because 20702740046377 - 2¹⁵ = 20702740013609 is a prime.

It is a super-2 number, since 2×20702740046377² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20702740046377.

It is not a weakly prime, because it can be changed into another prime (20702740046777) 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, 10351370023188 + 10351370023189.

It is an arithmetic number, because the mean of its divisors is an integer number (10351370023189).

Almost surely, 2^{20702740046377} is an apocalyptic number.

It is an amenable number.

20702740046377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20702740046377 is an equidigital number, since it uses as much as digits as its factorization.

20702740046377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2765952, while the sum is 49.

The spelling of 20702740046377 in words is "twenty trillion, seven hundred two billion, seven hundred forty million, forty-six thousand, three hundred seventy-seven".