20839819238 has 16 divisors (see below), whose sum is σ = 35732530464. Its totient is φ = 8929569600.

The previous prime is 20839819211. The next prime is 20839819313. The reversal of 20839819238 is 83291893802.

It is a self number, because there is not a number n which added to its sum of digits gives 20839819238.

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 7 ways as a sum of consecutive naturals, for example, 74495 + ... + 217322.

It is an arithmetic number, because the mean of its divisors is an integer number (2233283154).

Almost surely, 2^20839819238 is an apocalyptic number.

20839819238 is a deficient number, since it is larger than the sum of its proper divisors (14892711226).

20839819238 is a wasteful number, since it uses less digits than its factorization.

20839819238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296927.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 20839819238 in words is "twenty billion, eight hundred thirty-nine million, eight hundred nineteen thousand, two hundred thirty-eight".