206420433 has 4 divisors (see below), whose sum is σ = 275227248. Its totient is φ = 137613620.

The previous prime is 206420411. The next prime is 206420471. The reversal of 206420433 is 334024602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206420433 - 2⁸ = 206420177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206420033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34403403 + ... + 34403408.

It is an arithmetic number, because the mean of its divisors is an integer number (68806812).

Almost surely, 2^206420433 is an apocalyptic number.

It is an amenable number.

206420433 is a deficient number, since it is larger than the sum of its proper divisors (68806815).

206420433 is an equidigital number, since it uses as much as digits as its factorization.

206420433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68806814.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 206420433 is about 14367.3391064595. The cubic root of 206420433 is about 590.9955737312.

The spelling of 206420433 in words is "two hundred six million, four hundred twenty thousand, four hundred thirty-three".