20854648169671 has 2 divisors, whose sum is σ = 20854648169672. Its totient is φ = 20854648169670.

The previous prime is 20854648169647. The next prime is 20854648169717. The reversal of 20854648169671 is 17696184645802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20854648169671 - 2¹⁷ = 20854648038599 is a prime.

It is a super-3 number, since 3×20854648169671³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20854648169597 and 20854648169606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20854648164671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10427324084835 + 10427324084836.

It is an arithmetic number, because the mean of its divisors is an integer number (10427324084836).

Almost surely, 2^{20854648169671} is an apocalyptic number.

20854648169671 is a deficient number, since it is larger than the sum of its proper divisors (1).

20854648169671 is an equidigital number, since it uses as much as digits as its factorization.

20854648169671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139345920, while the sum is 67.

The spelling of 20854648169671 in words is "twenty trillion, eight hundred fifty-four billion, six hundred forty-eight million, one hundred sixty-nine thousand, six hundred seventy-one".