20963135 has 4 divisors (see below), whose sum is σ = 25155768. Its totient is φ = 16770504.

The previous prime is 20963101. The next prime is 20963147. The reversal of 20963135 is 53136902.

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 20963135 - 2⁶ = 20963071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20963098 and 20963107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2096309 + ... + 2096318.

It is an arithmetic number, because the mean of its divisors is an integer number (6288942).

Almost surely, 2^20963135 is an apocalyptic number.

20963135 is a deficient number, since it is larger than the sum of its proper divisors (4192633).

20963135 is an equidigital number, since it uses as much as digits as its factorization.

20963135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192632.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 20963135 is about 4578.5516268794. The cubic root of 20963135 is about 275.7308822206.

The spelling of 20963135 in words is "twenty million, nine hundred sixty-three thousand, one hundred thirty-five".