20754266671 has 2 divisors, whose sum is σ = 20754266672. Its totient is φ = 20754266670.

The previous prime is 20754266581. The next prime is 20754266677. The reversal of 20754266671 is 17666245702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20754266671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20754266677) 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, 10377133335 + 10377133336.

It is an arithmetic number, because the mean of its divisors is an integer number (10377133336).

Almost surely, 2^20754266671 is an apocalyptic number.

20754266671 is a deficient number, since it is larger than the sum of its proper divisors (1).

20754266671 is an equidigital number, since it uses as much as digits as its factorization.

20754266671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 20754266671 in words is "twenty billion, seven hundred fifty-four million, two hundred sixty-six thousand, six hundred seventy-one".