20550454213 has 4 divisors (see below), whose sum is σ = 20556117568. Its totient is φ = 20544790860.

The previous prime is 20550454163. The next prime is 20550454247. The reversal of 20550454213 is 31245405502.

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 20550454213 - 2²⁹ = 20013583301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550454513) 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, 2826231 + ... + 2833492.

It is an arithmetic number, because the mean of its divisors is an integer number (5139029392).

Almost surely, 2^20550454213 is an apocalyptic number.

It is an amenable number.

20550454213 is a deficient number, since it is larger than the sum of its proper divisors (5663355).

20550454213 is an equidigital number, since it uses as much as digits as its factorization.

20550454213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663354.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 20550454213 its reverse (31245405502), we get a palindrome (51795859715).

The spelling of 20550454213 in words is "twenty billion, five hundred fifty million, four hundred fifty-four thousand, two hundred thirteen".