20247032976437 has 2 divisors, whose sum is σ = 20247032976438. Its totient is φ = 20247032976436.

The previous prime is 20247032976397. The next prime is 20247032976461. The reversal of 20247032976437 is 73467923074202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16320258747556 + 3926774228881 = 4039834^2 + 1981609^2 .

It is a cyclic number.

It is not a de Polignac number, because 20247032976437 - 2¹⁰ = 20247032975413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20247037976437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10123516488218 + 10123516488219.

It is an arithmetic number, because the mean of its divisors is an integer number (10123516488219).

Almost surely, 2^{20247032976437} is an apocalyptic number.

It is an amenable number.

20247032976437 is a deficient number, since it is larger than the sum of its proper divisors (1).

20247032976437 is an equidigital number, since it uses as much as digits as its factorization.

20247032976437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21337344, while the sum is 56.

The spelling of 20247032976437 in words is "twenty trillion, two hundred forty-seven billion, thirty-two million, nine hundred seventy-six thousand, four hundred thirty-seven".