20673755934431 has 2 divisors, whose sum is σ = 20673755934432. Its totient is φ = 20673755934430.

The previous prime is 20673755934397. The next prime is 20673755934439. The reversal of 20673755934431 is 13443955737602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20673755934431 - 2⁶ = 20673755934367 is a prime.

It is a super-2 number, since 2×20673755934431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20673755934439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336877967215 + 10336877967216.

It is an arithmetic number, because the mean of its divisors is an integer number (10336877967216).

Almost surely, 2^{20673755934431} is an apocalyptic number.

20673755934431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20673755934431 is an equidigital number, since it uses as much as digits as its factorization.

20673755934431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57153600, while the sum is 59.

The spelling of 20673755934431 in words is "twenty trillion, six hundred seventy-three billion, seven hundred fifty-five million, nine hundred thirty-four thousand, four hundred thirty-one".