20632666 has 8 divisors (see below), whose sum is σ = 30969504. Its totient is φ = 10309500.

The previous prime is 20632663. The next prime is 20632691. The reversal of 20632666 is 66623602.

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

It is not an unprimeable number, because it can be changed into a prime (20632663) by changing a digit.

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, 2211 + ... + 6793.

It is an arithmetic number, because the mean of its divisors is an integer number (3871188).

Almost surely, 2^20632666 is an apocalyptic number.

20632666 is a deficient number, since it is larger than the sum of its proper divisors (10336838).

20632666 is a wasteful number, since it uses less digits than its factorization.

20632666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6836.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 20632666 is about 4542.3194515578. The cubic root of 20632666 is about 274.2743004045.

The spelling of 20632666 in words is "twenty million, six hundred thirty-two thousand, six hundred sixty-six".