20741971839 has 8 divisors (see below), whose sum is σ = 27692499120. Its totient is φ = 13809712896.

The previous prime is 20741971787. The next prime is 20741971867. The reversal of 20741971839 is 93817914702.

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

It is not a de Polignac number, because 20741971839 - 2¹¹ = 20741969791 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20741971791 and 20741971800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20741971039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4564434 + ... + 4568975.

It is an arithmetic number, because the mean of its divisors is an integer number (3461562390).

Almost surely, 2^20741971839 is an apocalyptic number.

20741971839 is a deficient number, since it is larger than the sum of its proper divisors (6950527281).

20741971839 is an equidigital number, since it uses as much as digits as its factorization.

20741971839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9134169.

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 20741971839 in words is "twenty billion, seven hundred forty-one million, nine hundred seventy-one thousand, eight hundred thirty-nine".