20686064038 has 16 divisors (see below), whose sum is σ = 31321128960. Its totient is φ = 10245936456.

The previous prime is 20686064023. The next prime is 20686064089. The reversal of 20686064038 is 83046068602.

It is a junction number, because it is equal to n+sod(n) for n = 20686063985 and 20686064003.

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 in 7 ways as a sum of consecutive naturals, for example, 105595 + ... + 229177.

It is an arithmetic number, because the mean of its divisors is an integer number (1957570560).

Almost surely, 2^20686064038 is an apocalyptic number.

20686064038 is a deficient number, since it is larger than the sum of its proper divisors (10635064922).

20686064038 is a wasteful number, since it uses less digits than its factorization.

20686064038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124371.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 20686064038 in words is "twenty billion, six hundred eighty-six million, sixty-four thousand, thirty-eight".