20835011 has 4 divisors (see below), whose sum is σ = 21343224. Its totient is φ = 20326800.

The previous prime is 20834981. The next prime is 20835037. The reversal of 20835011 is 11053802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11053802 = 2 ⋅5526901.

It is a cyclic number.

It is not a de Polignac number, because 20835011 - 2¹⁰ = 20833987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20835041) 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, 254045 + ... + 254126.

It is an arithmetic number, because the mean of its divisors is an integer number (5335806).

Almost surely, 2^20835011 is an apocalyptic number.

20835011 is a deficient number, since it is larger than the sum of its proper divisors (508213).

20835011 is an equidigital number, since it uses as much as digits as its factorization.

20835011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508212.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 20835011 is about 4564.5384213522. The cubic root of 20835011 is about 275.1679899207.

Adding to 20835011 its reverse (11053802), we get a palindrome (31888813).

The spelling of 20835011 in words is "twenty million, eight hundred thirty-five thousand, eleven".