20734113739871 has 4 divisors (see below), whose sum is σ = 23696129988432. Its totient is φ = 17772097491312.

The previous prime is 20734113739861. The next prime is 20734113739891. The reversal of 20734113739871 is 17893731143702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20734113739871 - 2³⁸ = 20459235832927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734113739811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481008124270 + ... + 1481008124283.

It is an arithmetic number, because the mean of its divisors is an integer number (5924032497108).

Almost surely, 2^{20734113739871} is an apocalyptic number.

20734113739871 is a deficient number, since it is larger than the sum of its proper divisors (2962016248561).

20734113739871 is an equidigital number, since it uses as much as digits as its factorization.

20734113739871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962016248560.

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 20734113739871 in words is "twenty trillion, seven hundred thirty-four billion, one hundred thirteen million, seven hundred thirty-nine thousand, eight hundred seventy-one".