16420258 has 4 divisors (see below), whose sum is σ = 24630390. Its totient is φ = 8210128.

The previous prime is 16420253. The next prime is 16420259. The reversal of 16420258 is 85202461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85202461 = 73 ⋅1167157.

It can be written as a sum of positive squares in only one way, i.e., 15816529 + 603729 = 3977^2 + 777^2 .

It is not an unprimeable number, because it can be changed into a prime (16420253) by changing a digit.

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 as a sum of consecutive naturals, namely, 4105063 + ... + 4105066.

Almost surely, 2^16420258 is an apocalyptic number.

16420258 is a deficient number, since it is larger than the sum of its proper divisors (8210132).

16420258 is an equidigital number, since it uses as much as digits as its factorization.

16420258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210131.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 16420258 is about 4052.1917526198. The cubic root of 16420258 is about 254.1713870066.

The spelling of 16420258 in words is "sixteen million, four hundred twenty thousand, two hundred fifty-eight".