10420421065 has 32 divisors (see below), whose sum is σ = 13692478464. Its totient is φ = 7578808320.

The previous prime is 10420421057. The next prime is 10420421083. The reversal of 10420421065 is 56012402401.

It is a happy number.

It is not a de Polignac number, because 10420421065 - 2³ = 10420421057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1543377 + ... + 1550113.

It is an arithmetic number, because the mean of its divisors is an integer number (427889952).

Almost surely, 2^10420421065 is an apocalyptic number.

It is an amenable number.

10420421065 is a deficient number, since it is larger than the sum of its proper divisors (3272057399).

10420421065 is a wasteful number, since it uses less digits than its factorization.

10420421065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 10420421065 its reverse (56012402401), we get a palindrome (66432823466).

The spelling of 10420421065 in words is "ten billion, four hundred twenty million, four hundred twenty-one thousand, sixty-five".