20865741843 has 8 divisors (see below), whose sum is σ = 29457517968. Its totient is φ = 13092230144.

The previous prime is 20865741823. The next prime is 20865741847. The reversal of 20865741843 is 34814756802.

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

It is a cyclic number.

It is not a de Polignac number, because 20865741843 - 2⁹ = 20865741331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20865741792 and 20865741801.

It is not an unprimeable number, because it can be changed into a prime (20865741847) by changing a digit.

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, 204566046 + ... + 204566147.

It is an arithmetic number, because the mean of its divisors is an integer number (3682189746).

Almost surely, 2^20865741843 is an apocalyptic number.

20865741843 is a deficient number, since it is larger than the sum of its proper divisors (8591776125).

20865741843 is a wasteful number, since it uses less digits than its factorization.

20865741843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409132213.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 20865741843 in words is "twenty billion, eight hundred sixty-five million, seven hundred forty-one thousand, eight hundred forty-three".