20205203345 has 16 divisors (see below), whose sum is σ = 25531848000. Its totient is φ = 15307725888.

The previous prime is 20205203329. The next prime is 20205203353. The reversal of 20205203345 is 54330250202.

It is a cyclic number.

It is not a de Polignac number, because 20205203345 - 2⁴ = 20205203329 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226826 + ... + 303084.

It is an arithmetic number, because the mean of its divisors is an integer number (1595740500).

Almost surely, 2^20205203345 is an apocalyptic number.

It is an amenable number.

20205203345 is a deficient number, since it is larger than the sum of its proper divisors (5326644655).

20205203345 is a wasteful number, since it uses less digits than its factorization.

20205203345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79072.

The product of its (nonzero) digits is 7200, while the sum is 26.

Adding to 20205203345 its reverse (54330250202), we get a palindrome (74535453547).

The spelling of 20205203345 in words is "twenty billion, two hundred five million, two hundred three thousand, three hundred forty-five".