20123003135 has 4 divisors (see below), whose sum is σ = 24147603768. Its totient is φ = 16098402504.

The previous prime is 20123003129. The next prime is 20123003149. The reversal of 20123003135 is 53130032102.

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 20123003135 - 2⁴ = 20123003119 is a prime.

It is a Duffinian number.

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, 2012300309 + ... + 2012300318.

It is an arithmetic number, because the mean of its divisors is an integer number (6036900942).

Almost surely, 2^20123003135 is an apocalyptic number.

20123003135 is a deficient number, since it is larger than the sum of its proper divisors (4024600633).

20123003135 is an equidigital number, since it uses as much as digits as its factorization.

20123003135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024600632.

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 20123003135 its reverse (53130032102), we get a palindrome (73253035237).

The spelling of 20123003135 in words is "twenty billion, one hundred twenty-three million, three thousand, one hundred thirty-five".