20135117 has 4 divisors (see below), whose sum is σ = 21194880. Its totient is φ = 19075356.

The previous prime is 20135113. The next prime is 20135147. The reversal of 20135117 is 71153102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71153102 = 2 ⋅35576551.

It is a cyclic number.

It is not a de Polignac number, because 20135117 - 2² = 20135113 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135113) 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, 529853 + ... + 529890.

It is an arithmetic number, because the mean of its divisors is an integer number (5298720).

Almost surely, 2^20135117 is an apocalyptic number.

It is an amenable number.

20135117 is a deficient number, since it is larger than the sum of its proper divisors (1059763).

20135117 is a wasteful number, since it uses less digits than its factorization.

20135117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059762.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 20135117 is about 4487.2170662895. The cubic root of 20135117 is about 272.0516635212.

Adding to 20135117 its reverse (71153102), we get a palindrome (91288219).

The spelling of 20135117 in words is "twenty million, one hundred thirty-five thousand, one hundred seventeen".