20235705 has 24 divisors (see below), whose sum is σ = 37086912. Its totient is φ = 9229536.

The previous prime is 20235697. The next prime is 20235727. The reversal of 20235705 is 50753202.

It is not a de Polignac number, because 20235705 - 2³ = 20235697 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 23 ways as a sum of consecutive naturals, for example, 45876 + ... + 46314.

It is an arithmetic number, because the mean of its divisors is an integer number (1545288).

Almost surely, 2^20235705 is an apocalyptic number.

It is an amenable number.

20235705 is a deficient number, since it is larger than the sum of its proper divisors (16851207).

20235705 is an frugal number, since it uses more digits than its factorization.

20235705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20235705 is about 4498.4113862563. The cubic root of 20235705 is about 272.5039361999.

Adding to 20235705 its reverse (50753202), we get a palindrome (70988907).

The spelling of 20235705 in words is "twenty million, two hundred thirty-five thousand, seven hundred five".