20345849843 has 8 divisors (see below), whose sum is σ = 22462888896. Its totient is φ = 18273380200.

The previous prime is 20345849807. The next prime is 20345849851. The reversal of 20345849843 is 34894854302.

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 20345849843 - 2⁶ = 20345849779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20345849791 and 20345849800.

It is not an unprimeable number, because it can be changed into a prime (20345849873) 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, 11141393 + ... + 11143218.

It is an arithmetic number, because the mean of its divisors is an integer number (2807861112).

Almost surely, 2^20345849843 is an apocalyptic number.

20345849843 is a deficient number, since it is larger than the sum of its proper divisors (2117039053).

20345849843 is a wasteful number, since it uses less digits than its factorization.

20345849843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22284705.

The product of its (nonzero) digits is 3317760, while the sum is 50.

The spelling of 20345849843 in words is "twenty billion, three hundred forty-five million, eight hundred forty-nine thousand, eight hundred forty-three".