20543320005 has 128 divisors (see below), whose sum is σ = 38426572800. Its totient is φ = 9294372864.

The previous prime is 20543320003. The next prime is 20543320051. The reversal of 20543320005 is 50002334502.

It is not a de Polignac number, because 20543320005 - 2¹ = 20543320003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543320003) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9833001 + ... + 9835089.

It is an arithmetic number, because the mean of its divisors is an integer number (300207600).

Almost surely, 2^20543320005 is an apocalyptic number.

It is an amenable number.

20543320005 is a deficient number, since it is larger than the sum of its proper divisors (17883252795).

20543320005 is a wasteful number, since it uses less digits than its factorization.

20543320005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223.

The product of its (nonzero) digits is 3600, while the sum is 24.

Adding to 20543320005 its reverse (50002334502), we get a palindrome (70545654507).

The spelling of 20543320005 in words is "twenty billion, five hundred forty-three million, three hundred twenty thousand, five".