12006436253 has 4 divisors (see below), whose sum is σ = 13721641440. Its totient is φ = 10291231068.

The previous prime is 12006436231. The next prime is 12006436259. The reversal of 12006436253 is 35263460021.

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: 35263460021 = 71 ⋅496668451.

It is a cyclic number.

It is not a de Polignac number, because 12006436253 - 2¹² = 12006432157 is a prime.

It is a super-2 number, since 2×12006436253² (a number of 21 digits) 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 (12006436259) 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, 857602583 + ... + 857602596.

It is an arithmetic number, because the mean of its divisors is an integer number (3430410360).

Almost surely, 2^12006436253 is an apocalyptic number.

It is an amenable number.

12006436253 is a deficient number, since it is larger than the sum of its proper divisors (1715205187).

12006436253 is an equidigital number, since it uses as much as digits as its factorization.

12006436253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715205186.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 12006436253 its reverse (35263460021), we get a palindrome (47269896274).

The spelling of 12006436253 in words is "twelve billion, six million, four hundred thirty-six thousand, two hundred fifty-three".