20352666 has 8 divisors (see below), whose sum is σ = 40705344. Its totient is φ = 6784220.

The previous prime is 20352653. The next prime is 20352671. The reversal of 20352666 is 66625302.

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

20352666 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1696050 + ... + 1696061.

It is an arithmetic number, because the mean of its divisors is an integer number (5088168).

Almost surely, 2^20352666 is an apocalyptic number.

20352666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20352666 is a wasteful number, since it uses less digits than its factorization.

20352666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3392116.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20352666 is about 4511.3929112858. The cubic root of 20352666 is about 273.0279459913.

Adding to 20352666 its reverse (66625302), we get a palindrome (86977968).

The spelling of 20352666 in words is "twenty million, three hundred fifty-two thousand, six hundred sixty-six".