20747364437377 has 2 divisors, whose sum is σ = 20747364437378. Its totient is φ = 20747364437376.

The previous prime is 20747364437353. The next prime is 20747364437407. The reversal of 20747364437377 is 77373446374702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17542032799041 + 3205331638336 = 4188321^2 + 1790344^2 .

It is a cyclic number.

It is not a de Polignac number, because 20747364437377 - 2⁷ = 20747364437249 is a prime.

It is not a weakly prime, because it can be changed into another prime (20747364837377) 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, 10373682218688 + 10373682218689.

It is an arithmetic number, because the mean of its divisors is an integer number (10373682218689).

Almost surely, 2^{20747364437377} is an apocalyptic number.

It is an amenable number.

20747364437377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20747364437377 is an equidigital number, since it uses as much as digits as its factorization.

20747364437377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 348509952, while the sum is 64.

The spelling of 20747364437377 in words is "twenty trillion, seven hundred forty-seven billion, three hundred sixty-four million, four hundred thirty-seven thousand, three hundred seventy-seven".