20608646 has 8 divisors (see below), whose sum is σ = 31219344. Its totient is φ = 10202200.

The previous prime is 20608613. The next prime is 20608657. The reversal of 20608646 is 64680602.

It is a happy number.

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

It is a congruent 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, 50810 + ... + 51213.

It is an arithmetic number, because the mean of its divisors is an integer number (3902418).

Almost surely, 2^20608646 is an apocalyptic number.

20608646 is a deficient number, since it is larger than the sum of its proper divisors (10610698).

20608646 is a wasteful number, since it uses less digits than its factorization.

20608646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102126.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20608646 is about 4539.6746579463. The cubic root of 20608646 is about 274.1678247976.

The spelling of 20608646 in words is "twenty million, six hundred eight thousand, six hundred forty-six".