16820035 has 16 divisors (see below), whose sum is σ = 21468960. Its totient is φ = 12614400.

The previous prime is 16820017. The next prime is 16820039. The reversal of 16820035 is 53002861.

It is a happy number.

It is not a de Polignac number, because 16820035 - 2¹¹ = 16817987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16819991 and 16820009.

It is not an unprimeable number, because it can be changed into a prime (16820039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8719 + ... + 10471.

It is an arithmetic number, because the mean of its divisors is an integer number (1341810).

Almost surely, 2^16820035 is an apocalyptic number.

16820035 is a deficient number, since it is larger than the sum of its proper divisors (4648925).

16820035 is a wasteful number, since it uses less digits than its factorization.

16820035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 16820035 is about 4101.2235979034. The cubic root of 16820035 is about 256.2176036776.

Adding to 16820035 its reverse (53002861), we get a palindrome (69822896).

The spelling of 16820035 in words is "sixteen million, eight hundred twenty thousand, thirty-five".