20870186331056 has 20 divisors (see below), whose sum is σ = 40436595218904. Its totient is φ = 10434935952000.

The previous prime is 20870186331019. The next prime is 20870186331079. The reversal of 20870186331056 is 65013368107802.

It is a junction number, because it is equal to n+sod(n) for n = 20870186330995 and 20870186331013.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8726930 + ... + 10858161.

Almost surely, 2^{20870186331056} is an apocalyptic number.

It is an amenable number.

20870186331056 is a deficient number, since it is larger than the sum of its proper divisors (19566408887848).

20870186331056 is a wasteful number, since it uses less digits than its factorization.

20870186331056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19651700 (or 19651694 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 20870186331056 in words is "twenty trillion, eight hundred seventy billion, one hundred eighty-six million, three hundred thirty-one thousand, fifty-six".