20850346805 has 16 divisors (see below), whose sum is σ = 25331154240. Its totient is φ = 16474364928.

The previous prime is 20850346801. The next prime is 20850346859. The reversal of 20850346805 is 50864305802.

It is a cyclic number.

It is not a de Polignac number, because 20850346805 - 2² = 20850346801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850346801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56414 + ... + 211856.

It is an arithmetic number, because the mean of its divisors is an integer number (1583197140).

Almost surely, 2^20850346805 is an apocalyptic number.

It is an amenable number.

20850346805 is a deficient number, since it is larger than the sum of its proper divisors (4480807435).

20850346805 is a wasteful number, since it uses less digits than its factorization.

20850346805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155780.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 20850346805 in words is "twenty billion, eight hundred fifty million, three hundred forty-six thousand, eight hundred five".