20205314345 has 16 divisors (see below), whose sum is σ = 25258746240. Its totient is φ = 15502704000.

The previous prime is 20205314341. The next prime is 20205314359. The reversal of 20205314345 is 54341350202.

It is a happy number.

It is not a de Polignac number, because 20205314345 - 2² = 20205314341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20205314341) 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, 823181 + ... + 847370.

It is an arithmetic number, because the mean of its divisors is an integer number (1578671640).

Almost surely, 2^20205314345 is an apocalyptic number.

It is an amenable number.

20205314345 is a deficient number, since it is larger than the sum of its proper divisors (5053431895).

20205314345 is a wasteful number, since it uses less digits than its factorization.

20205314345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670656.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 20205314345 its reverse (54341350202), we get a palindrome (74546664547).

The spelling of 20205314345 in words is "twenty billion, two hundred five million, three hundred fourteen thousand, three hundred forty-five".