2128420365 has 16 divisors (see below), whose sum is σ = 3410025216. Its totient is φ = 1133640000.

The previous prime is 2128420319. The next prime is 2128420373. The reversal of 2128420365 is 5630248212.

It is not a de Polignac number, because 2128420365 - 2¹⁰ = 2128419341 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 83206 + ... + 105735.

It is an arithmetic number, because the mean of its divisors is an integer number (213126576).

Almost surely, 2^2128420365 is an apocalyptic number.

It is an amenable number.

2128420365 is a deficient number, since it is larger than the sum of its proper divisors (1281604851).

2128420365 is a wasteful number, since it uses less digits than its factorization.

2128420365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189700.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 2128420365 is about 46134.8064372226. The cubic root of 2128420365 is about 1286.3302076554.

Adding to 2128420365 its reverse (5630248212), we get a palindrome (7758668577).

The spelling of 2128420365 in words is "two billion, one hundred twenty-eight million, four hundred twenty thousand, three hundred sixty-five".