20850871704049 has 4 divisors (see below), whose sum is σ = 20857995339264. Its totient is φ = 20843748068836.

The previous prime is 20850871704001. The next prime is 20850871704083. The reversal of 20850871704049 is 94040717805802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20850871704049 - 2⁹ = 20850871703537 is a prime.

It is a super-3 number, since 3×20850871704049³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20850871702049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3561813217 + ... + 3561819070.

It is an arithmetic number, because the mean of its divisors is an integer number (5214498834816).

Almost surely, 2^{20850871704049} is an apocalyptic number.

It is an amenable number.

20850871704049 is a deficient number, since it is larger than the sum of its proper divisors (7123635215).

20850871704049 is an equidigital number, since it uses as much as digits as its factorization.

20850871704049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7123635214.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 20850871704049 in words is "twenty trillion, eight hundred fifty billion, eight hundred seventy-one million, seven hundred four thousand, forty-nine".