20713717837838 has 8 divisors (see below), whose sum is σ = 31070614225032. Its totient is φ = 10356846429496.

The previous prime is 20713717837829. The next prime is 20713717837861. The reversal of 20713717837838 is 83873871731702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4011920 + ... + 7584387.

It is an arithmetic number, because the mean of its divisors is an integer number (3883826778129).

Almost surely, 2^{20713717837838} is an apocalyptic number.

20713717837838 is a deficient number, since it is larger than the sum of its proper divisors (10356896387194).

20713717837838 is a wasteful number, since it uses less digits than its factorization.

20713717837838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12489426.

The product of its (nonzero) digits is 66382848, while the sum is 65.

The spelling of 20713717837838 in words is "twenty trillion, seven hundred thirteen billion, seven hundred seventeen million, eight hundred thirty-seven thousand, eight hundred thirty-eight".