16420440202 has 4 divisors (see below), whose sum is σ = 24630660306. Its totient is φ = 8210220100.

The previous prime is 16420440161. The next prime is 16420440247. The reversal of 16420440202 is 20204402461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20204402461 = 4289 ⋅4710749.

It can be written as a sum of positive squares in only one way, i.e., 10098441081 + 6321999121 = 100491^2 + 79511^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4105110049 + ... + 4105110052.

Almost surely, 2^16420440202 is an apocalyptic number.

16420440202 is a deficient number, since it is larger than the sum of its proper divisors (8210220104).

16420440202 is an equidigital number, since it uses as much as digits as its factorization.

16420440202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210220103.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 16420440202 its reverse (20204402461), we get a palindrome (36624842663).

The spelling of 16420440202 in words is "sixteen billion, four hundred twenty million, four hundred forty thousand, two hundred two".