20668882 has 8 divisors (see below), whose sum is σ = 33388236. Its totient is φ = 9539472.

The previous prime is 20668873. The next prime is 20668891. The reversal of 20668882 is 28886602.

It is an interprime number because it is at equal distance from previous prime (20668873) and next prime (20668891).

It can be written as a sum of positive squares in 2 ways, for example, as 20439441 + 229441 = 4521^2 + 479^2 .

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

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, 397453 + ... + 397504.

Almost surely, 2^20668882 is an apocalyptic number.

20668882 is a deficient number, since it is larger than the sum of its proper divisors (12719354).

20668882 is a wasteful number, since it uses less digits than its factorization.

20668882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794972.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 20668882 is about 4546.3042133144. The cubic root of 20668882 is about 274.4346821981.

The spelling of 20668882 in words is "twenty million, six hundred sixty-eight thousand, eight hundred eighty-two".