20700235 has 4 divisors (see below), whose sum is σ = 24840288. Its totient is φ = 16560184.

The previous prime is 20700233. The next prime is 20700269. The reversal of 20700235 is 53200702.

It is a happy number.

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 20700235 - 2¹ = 20700233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20700233) 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, 2070019 + ... + 2070028.

It is an arithmetic number, because the mean of its divisors is an integer number (6210072).

Almost surely, 2^20700235 is an apocalyptic number.

20700235 is a deficient number, since it is larger than the sum of its proper divisors (4140053).

20700235 is an equidigital number, since it uses as much as digits as its factorization.

20700235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140052.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 20700235 is about 4549.7510920928. The cubic root of 20700235 is about 274.5733770656.

Adding to 20700235 its reverse (53200702), we get a palindrome (73900937).

The spelling of 20700235 in words is "twenty million, seven hundred thousand, two hundred thirty-five".