20735345 has 8 divisors (see below), whose sum is σ = 24907176. Its totient is φ = 16571776.

The previous prime is 20735339. The next prime is 20735347. The reversal of 20735345 is 54353702.

It can be written as a sum of positive squares in 4 ways, for example, as 14641 + 20720704 = 121^2 + 4552^2 .

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 20735345 - 2⁴ = 20735329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20735347) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7469 + ... + 9861.

It is an arithmetic number, because the mean of its divisors is an integer number (3113397).

Almost surely, 2^20735345 is an apocalyptic number.

It is an amenable number.

20735345 is a deficient number, since it is larger than the sum of its proper divisors (4171831).

20735345 is a wasteful number, since it uses less digits than its factorization.

20735345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4131.

The product of its (nonzero) digits is 12600, while the sum is 29.

The square root of 20735345 is about 4553.6079102180. The cubic root of 20735345 is about 274.7285254824.

The spelling of 20735345 in words is "twenty million, seven hundred thirty-five thousand, three hundred forty-five".