20790705 has 16 divisors (see below), whose sum is σ = 35824320. Its totient is φ = 10235328.

The previous prime is 20790701. The next prime is 20790713. The reversal of 20790705 is 50709702.

It is a happy number.

It is not a de Polignac number, because 20790705 - 2² = 20790701 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20790701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53115 + ... + 53504.

It is an arithmetic number, because the mean of its divisors is an integer number (2239020).

Almost surely, 2^20790705 is an apocalyptic number.

It is an amenable number.

20790705 is a deficient number, since it is larger than the sum of its proper divisors (15033615).

20790705 is a wasteful number, since it uses less digits than its factorization.

20790705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106640.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 20790705 is about 4559.6825547400. The cubic root of 20790705 is about 274.9728017178.

The spelling of 20790705 in words is "twenty million, seven hundred ninety thousand, seven hundred five".