50605450021 has 4 divisors (see below), whose sum is σ = 57834800032. Its totient is φ = 43376100012.

The previous prime is 50605449991. The next prime is 50605450067. The reversal of 50605450021 is 12005450605.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12005450605 = 5 ⋅2401090121.

It is not a de Polignac number, because 50605450021 - 2¹⁷ = 50605318949 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 (50605450121) 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, 3614674995 + ... + 3614675008.

It is an arithmetic number, because the mean of its divisors is an integer number (14458700008).

Almost surely, 2^50605450021 is an apocalyptic number.

It is an amenable number.

50605450021 is a deficient number, since it is larger than the sum of its proper divisors (7229350011).

50605450021 is an equidigital number, since it uses as much as digits as its factorization.

50605450021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7229350010.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 50605450021 in words is "fifty billion, six hundred five million, four hundred fifty thousand, twenty-one".