20459087871 has 8 divisors (see below), whose sum is σ = 27377264304. Its totient is φ = 13590151680.

The previous prime is 20459087867. The next prime is 20459087879. The reversal of 20459087871 is 17878095402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20459087871 - 2² = 20459087867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20459087879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12309090 + ... + 12310751.

It is an arithmetic number, because the mean of its divisors is an integer number (3422158038).

Almost surely, 2^20459087871 is an apocalyptic number.

20459087871 is a deficient number, since it is larger than the sum of its proper divisors (6918176433).

20459087871 is a wasteful number, since it uses less digits than its factorization.

20459087871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24620121.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 20459087871 in words is "twenty billion, four hundred fifty-nine million, eighty-seven thousand, eight hundred seventy-one".