20553541003321 has 4 divisors (see below), whose sum is σ = 20572449505792. Its totient is φ = 20534632500852.

The previous prime is 20553541003319. The next prime is 20553541003367. The reversal of 20553541003321 is 12330014535502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20553541003321 - 2¹ = 20553541003319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20553541003301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9454249605 + ... + 9454251778.

It is an arithmetic number, because the mean of its divisors is an integer number (5143112376448).

Almost surely, 2^{20553541003321} is an apocalyptic number.

It is an amenable number.

20553541003321 is a deficient number, since it is larger than the sum of its proper divisors (18908502471).

20553541003321 is a wasteful number, since it uses less digits than its factorization.

20553541003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18908502470.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 20553541003321 its reverse (12330014535502), we get a palindrome (32883555538823).

The spelling of 20553541003321 in words is "twenty trillion, five hundred fifty-three billion, five hundred forty-one million, three thousand, three hundred twenty-one".