20671204846 has 4 divisors (see below), whose sum is σ = 31006807272. Its totient is φ = 10335602422.

The previous prime is 20671204837. The next prime is 20671204909. The reversal of 20671204846 is 64840217602.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20671204799 and 20671204808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5167801210 + ... + 5167801213.

It is an arithmetic number, because the mean of its divisors is an integer number (7751701818).

Almost surely, 2^20671204846 is an apocalyptic number.

20671204846 is a deficient number, since it is larger than the sum of its proper divisors (10335602426).

20671204846 is a wasteful number, since it uses less digits than its factorization.

20671204846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10335602425.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 20671204846 in words is "twenty billion, six hundred seventy-one million, two hundred four thousand, eight hundred forty-six".