20550450351 has 16 divisors (see below), whose sum is σ = 28349192160. Its totient is φ = 13226129280.

The previous prime is 20550450337. The next prime is 20550450353. The reversal of 20550450351 is 15305405502.

It is a happy number.

It is not a de Polignac number, because 20550450351 - 2⁹ = 20550449839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550450353) 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, 1116741 + ... + 1134993.

It is an arithmetic number, because the mean of its divisors is an integer number (1771824510).

Almost surely, 2^20550450351 is an apocalyptic number.

20550450351 is a deficient number, since it is larger than the sum of its proper divisors (7798741809).

20550450351 is a wasteful number, since it uses less digits than its factorization.

20550450351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31226.

The product of its (nonzero) digits is 15000, while the sum is 30.

Adding to 20550450351 its reverse (15305405502), we get a palindrome (35855855853).

The spelling of 20550450351 in words is "twenty billion, five hundred fifty million, four hundred fifty thousand, three hundred fifty-one".