20135894 has 8 divisors (see below), whose sum is σ = 30543480. Its totient is φ = 9954736.

The previous prime is 20135893. The next prime is 20135909. The reversal of 20135894 is 49853102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20135894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135893) 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, 56384 + ... + 56739.

It is an arithmetic number, because the mean of its divisors is an integer number (3817935).

Almost surely, 2^20135894 is an apocalyptic number.

20135894 is a deficient number, since it is larger than the sum of its proper divisors (10407586).

20135894 is a wasteful number, since it uses less digits than its factorization.

20135894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113214.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20135894 is about 4487.3036447292. The cubic root of 20135894 is about 272.0551629036.

Adding to 20135894 its reverse (49853102), we get a palindrome (69988996).

The spelling of 20135894 in words is "twenty million, one hundred thirty-five thousand, eight hundred ninety-four".