206642045 has 8 divisors (see below), whose sum is σ = 248408160. Its totient is φ = 165021840.

The previous prime is 206642041. The next prime is 206642053. The reversal of 206642045 is 540246602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206642045 - 2² = 206642041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 206641999 and 206642017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206642041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33335 + ... + 39044.

It is an arithmetic number, because the mean of its divisors is an integer number (31051020).

Almost surely, 2^206642045 is an apocalyptic number.

It is an amenable number.

206642045 is a deficient number, since it is larger than the sum of its proper divisors (41766115).

206642045 is an equidigital number, since it uses as much as digits as its factorization.

206642045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72955.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 206642045 is about 14375.0493912195. The cubic root of 206642045 is about 591.2069947728.

Adding to 206642045 its reverse (540246602), we get a palindrome (746888647).

The spelling of 206642045 in words is "two hundred six million, six hundred forty-two thousand, forty-five".