20817312038 has 64 divisors (see below), whose sum is σ = 34312481280. Its totient is φ = 9438508800.

The previous prime is 20817312017. The next prime is 20817312077. The reversal of 20817312038 is 83021371802.

It is a junction number, because it is equal to n+sod(n) for n = 20817311989 and 20817312007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33959420 + ... + 33960032.

It is an arithmetic number, because the mean of its divisors is an integer number (536132520).

Almost surely, 2^20817312038 is an apocalyptic number.

20817312038 is a deficient number, since it is larger than the sum of its proper divisors (13495169242).

20817312038 is a wasteful number, since it uses less digits than its factorization.

20817312038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 20817312038 in words is "twenty billion, eight hundred seventeen million, three hundred twelve thousand, thirty-eight".