20799705 has 16 divisors (see below), whose sum is σ = 34727040. Its totient is φ = 10610688.

The previous prime is 20799689. The next prime is 20799731. The reversal of 20799705 is 50799702.

It is not a de Polignac number, because 20799705 - 2⁴ = 20799689 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 29800 + ... + 30489.

It is an arithmetic number, because the mean of its divisors is an integer number (2170440).

Almost surely, 2^20799705 is an apocalyptic number.

It is an amenable number.

20799705 is a deficient number, since it is larger than the sum of its proper divisors (13927335).

20799705 is a wasteful number, since it uses less digits than its factorization.

20799705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60320.

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 20799705 is about 4560.6693587674. The cubic root of 20799705 is about 275.0124732634.

The spelling of 20799705 in words is "twenty million, seven hundred ninety-nine thousand, seven hundred five".