16406033 has 10 divisors (see below), whose sum is σ = 19142034. Its totient is φ = 14060256.

The previous prime is 16406023. The next prime is 16406051. The reversal of 16406033 is 33060461.

16406033 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11102224 + 5303809 = 3332^2 + 2303^2 .

It is not a de Polignac number, because 16406033 - 2⁴ = 16406017 is a prime.

It is a Duffinian number.

16406033 is strictly pandigital in base 8.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16406023) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1016 + ... + 5817.

Almost surely, 2^16406033 is an apocalyptic number.

It is an amenable number.

16406033 is a deficient number, since it is larger than the sum of its proper divisors (2736001).

16406033 is an frugal number, since it uses more digits than its factorization.

16406033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6861 (or 6840 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 16406033 is about 4050.4361493548. The cubic root of 16406033 is about 254.0979689041.

Adding to 16406033 its reverse (33060461), we get a palindrome (49466494).

The spelling of 16406033 in words is "sixteen million, four hundred six thousand, thirty-three".