20871662176 has 24 divisors (see below), whose sum is σ = 41095210464. Its totient is φ = 10434783360.

The previous prime is 20871662153. The next prime is 20871662209. The reversal of 20871662176 is 67126617802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365481 + ... + 418711.

It is an arithmetic number, because the mean of its divisors is an integer number (1712300436).

Almost surely, 2^20871662176 is an apocalyptic number.

It is an amenable number.

20871662176 is a deficient number, since it is larger than the sum of its proper divisors (20223548288).

20871662176 is a wasteful number, since it uses less digits than its factorization.

20871662176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65494 (or 65486 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 20871662176 in words is "twenty billion, eight hundred seventy-one million, six hundred sixty-two thousand, one hundred seventy-six".