16420955 has 4 divisors (see below), whose sum is σ = 19705152. Its totient is φ = 13136760.

The previous prime is 16420927. The next prime is 16420961. The reversal of 16420955 is 55902461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16420955 - 2⁶ = 16420891 is a prime.

It is a super-2 number, since 2×16420955² = 539295526224050, which 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642091 + ... + 1642100.

It is an arithmetic number, because the mean of its divisors is an integer number (4926288).

Almost surely, 2^16420955 is an apocalyptic number.

16420955 is a deficient number, since it is larger than the sum of its proper divisors (3284197).

16420955 is an equidigital number, since it uses as much as digits as its factorization.

16420955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284196.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 16420955 is about 4052.2777545474. The cubic root of 16420955 is about 254.1749832747.

The spelling of 16420955 in words is "sixteen million, four hundred twenty thousand, nine hundred fifty-five".