20708799 has 4 divisors (see below), whose sum is σ = 27611736. Its totient is φ = 13805864.

The previous prime is 20708791. The next prime is 20708819. The reversal of 20708799 is 99780702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20708799 - 2³ = 20708791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20708799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20708791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3451464 + ... + 3451469.

It is an arithmetic number, because the mean of its divisors is an integer number (6902934).

Almost surely, 2^20708799 is an apocalyptic number.

20708799 is a deficient number, since it is larger than the sum of its proper divisors (6902937).

20708799 is an equidigital number, since it uses as much as digits as its factorization.

20708799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902936.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 20708799 is about 4550.6921451577. The cubic root of 20708799 is about 274.6112368967.

The spelling of 20708799 in words is "twenty million, seven hundred eight thousand, seven hundred ninety-nine".