20443705 has 8 divisors (see below), whose sum is σ = 25103232. Its totient is φ = 15974448.

The previous prime is 20443697. The next prime is 20443727. The reversal of 20443705 is 50734402.

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

It is a cyclic number.

It is not a de Polignac number, because 20443705 - 2³ = 20443697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20443705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47329 + ... + 47758.

It is an arithmetic number, because the mean of its divisors is an integer number (3137904).

Almost surely, 2^20443705 is an apocalyptic number.

It is an amenable number.

20443705 is a deficient number, since it is larger than the sum of its proper divisors (4659527).

20443705 is an equidigital number, since it uses as much as digits as its factorization.

20443705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95135.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20443705 is about 4521.4715524926. The cubic root of 20443705 is about 273.4344319982.

The spelling of 20443705 in words is "twenty million, four hundred forty-three thousand, seven hundred five".