20704646 has 8 divisors (see below), whose sum is σ = 32407344. Its totient is φ = 9902200.

The previous prime is 20704639. The next prime is 20704687. The reversal of 20704646 is 64640702.

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

20704646 is a modest number, since divided by 4646 gives 2070 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225005 + ... + 225096.

It is an arithmetic number, because the mean of its divisors is an integer number (4050918).

Almost surely, 2^20704646 is an apocalyptic number.

20704646 is a deficient number, since it is larger than the sum of its proper divisors (11702698).

20704646 is a wasteful number, since it uses less digits than its factorization.

20704646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450126.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20704646 is about 4550.2358180648. The cubic root of 20704646 is about 274.5928785697.

The spelling of 20704646 in words is "twenty million, seven hundred four thousand, six hundred forty-six".