20126135 has 4 divisors (see below), whose sum is σ = 24151368. Its totient is φ = 16100904.

The previous prime is 20126131. The next prime is 20126137. The reversal of 20126135 is 53162102.

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 20126135 - 2² = 20126131 is a prime.

It is a super-2 number, since 2×20126135² = 810122620076450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20126131) 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, 2012609 + ... + 2012618.

It is an arithmetic number, because the mean of its divisors is an integer number (6037842).

Almost surely, 2^20126135 is an apocalyptic number.

20126135 is a deficient number, since it is larger than the sum of its proper divisors (4025233).

20126135 is an equidigital number, since it uses as much as digits as its factorization.

20126135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4025232.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20126135 is about 4486.2161116023. The cubic root of 20126135 is about 272.0112046639.

Adding to 20126135 its reverse (53162102), we get a palindrome (73288237).

The spelling of 20126135 in words is "twenty million, one hundred twenty-six thousand, one hundred thirty-five".