20735705 has 8 divisors (see below), whose sum is σ = 24914304. Its totient is φ = 16567600.

The previous prime is 20735681. The next prime is 20735711. The reversal of 20735705 is 50753702.

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

It is a de Polignac number, because none of the positive numbers 2^k-20735705 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 2720 + ... + 6990.

It is an arithmetic number, because the mean of its divisors is an integer number (3114288).

Almost surely, 2^20735705 is an apocalyptic number.

It is an amenable number.

20735705 is a deficient number, since it is larger than the sum of its proper divisors (4178599).

20735705 is an equidigital number, since it uses as much as digits as its factorization.

20735705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247.

The product of its (nonzero) digits is 7350, while the sum is 29.

The square root of 20735705 is about 4553.6474391415. The cubic root of 20735705 is about 274.7301153876.

The spelling of 20735705 in words is "twenty million, seven hundred thirty-five thousand, seven hundred five".