20544315321 has 16 divisors (see below), whose sum is σ = 27794897280. Its totient is φ = 13495340160.

The previous prime is 20544315287. The next prime is 20544315331. The reversal of 20544315321 is 12351344502.

It is not a de Polignac number, because 20544315321 - 2¹³ = 20544307129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20544315331) 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, 180295 + ... + 271283.

It is an arithmetic number, because the mean of its divisors is an integer number (1737181080).

Almost surely, 2^20544315321 is an apocalyptic number.

It is an amenable number.

20544315321 is a deficient number, since it is larger than the sum of its proper divisors (7250581959).

20544315321 is a wasteful number, since it uses less digits than its factorization.

20544315321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92096.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 20544315321 its reverse (12351344502), we get a palindrome (32895659823).

The spelling of 20544315321 in words is "twenty billion, five hundred forty-four million, three hundred fifteen thousand, three hundred twenty-one".