20704746 has 8 divisors (see below), whose sum is σ = 41409504. Its totient is φ = 6901580.

The previous prime is 20704729. The next prime is 20704763. The reversal of 20704746 is 64740702.

It is an interprime number because it is at equal distance from previous prime (20704729) and next prime (20704763).

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

20704746 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1725390 + ... + 1725401.

It is an arithmetic number, because the mean of its divisors is an integer number (5176188).

Almost surely, 2^20704746 is an apocalyptic number.

20704746 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.

20704746 is a wasteful number, since it uses less digits than its factorization.

20704746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450796.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 20704746 is about 4550.2468064930. The cubic root of 20704746 is about 274.5933206483.

The spelling of 20704746 in words is "twenty million, seven hundred four thousand, seven hundred forty-six".