20554030221 has 4 divisors (see below), whose sum is σ = 27405373632. Its totient is φ = 13702686812.

The previous prime is 20554030207. The next prime is 20554030241. The reversal of 20554030221 is 12203045502.

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 20554030221 - 2⁶ = 20554030157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20554030191 and 20554030200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554030241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3425671701 + ... + 3425671706.

It is an arithmetic number, because the mean of its divisors is an integer number (6851343408).

Almost surely, 2^20554030221 is an apocalyptic number.

It is an amenable number.

20554030221 is a deficient number, since it is larger than the sum of its proper divisors (6851343411).

20554030221 is an equidigital number, since it uses as much as digits as its factorization.

20554030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6851343410.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20554030221 its reverse (12203045502), we get a palindrome (32757075723).

The spelling of 20554030221 in words is "twenty billion, five hundred fifty-four million, thirty thousand, two hundred twenty-one".