16420210135505 has 16 divisors (see below), whose sum is σ = 21498823548864. Its totient is φ = 11940151154880.

The previous prime is 16420210135481. The next prime is 16420210135513. The reversal of 16420210135505 is 50553101202461.

It is not a de Polignac number, because 16420210135505 - 2²² = 16420205941201 is a prime.

It is a super-2 number, since 2×16420210135505² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22383914 + ... + 23105843.

It is an arithmetic number, because the mean of its divisors is an integer number (1343676471804).

Almost surely, 2^{16420210135505} is an apocalyptic number.

It is an amenable number.

16420210135505 is a deficient number, since it is larger than the sum of its proper divisors (5078613413359).

16420210135505 is a wasteful number, since it uses less digits than its factorization.

16420210135505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45496336.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 16420210135505 its reverse (50553101202461), we get a palindrome (66973311337966).

The spelling of 16420210135505 in words is "sixteen trillion, four hundred twenty billion, two hundred ten million, one hundred thirty-five thousand, five hundred five".