16420203 has 6 divisors (see below), whose sum is σ = 23718084. Its totient is φ = 10946796.

The previous prime is 16420189. The next prime is 16420219. The reversal of 16420203 is 30202461.

It is a happy number.

16420203 is a `hidden beast` number, since 1 + 642 + 0 + 20 + 3 = 666.

It is not a de Polignac number, because 16420203 - 2⁵ = 16420171 is a prime.

It is a super-2 number, since 2×16420203² = 539246133122418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16420223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 912225 + ... + 912242.

It is an arithmetic number, because the mean of its divisors is an integer number (3953014).

Almost surely, 2^16420203 is an apocalyptic number.

16420203 is a deficient number, since it is larger than the sum of its proper divisors (7297881).

16420203 is a wasteful number, since it uses less digits than its factorization.

16420203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824473 (or 1824470 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 16420203 is about 4052.1849661633. The cubic root of 16420203 is about 254.1711032221.

Adding to 16420203 its reverse (30202461), we get a palindrome (46622664).

The spelling of 16420203 in words is "sixteen million, four hundred twenty thousand, two hundred three".