20055250223521 has 4 divisors (see below), whose sum is σ = 20055291748272. Its totient is φ = 20055208698772.

The previous prime is 20055250223513. The next prime is 20055250223537. The reversal of 20055250223521 is 12532205255002.

It is a happy number.

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 20055250223521 - 2³ = 20055250223513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20055250224521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20029291 + ... + 21006736.

It is an arithmetic number, because the mean of its divisors is an integer number (5013822937068).

Almost surely, 2^{20055250223521} is an apocalyptic number.

It is an amenable number.

20055250223521 is a deficient number, since it is larger than the sum of its proper divisors (41524751).

20055250223521 is an equidigital number, since it uses as much as digits as its factorization.

20055250223521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41524750.

The product of its (nonzero) digits is 60000, while the sum is 34.

Adding to 20055250223521 its reverse (12532205255002), we get a palindrome (32587455478523).

The spelling of 20055250223521 in words is "twenty trillion, fifty-five billion, two hundred fifty million, two hundred twenty-three thousand, five hundred twenty-one".