12009434757 has 4 divisors (see below), whose sum is σ = 16012579680. Its totient is φ = 8006289836.

The previous prime is 12009434743. The next prime is 12009434771. The reversal of 12009434757 is 75743490021.

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.

It is an interprime number because it is at equal distance from previous prime (12009434743) and next prime (12009434771).

It is a cyclic number.

It is not a de Polignac number, because 12009434757 - 2⁶ = 12009434693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12009434707) 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, 2001572457 + ... + 2001572462.

It is an arithmetic number, because the mean of its divisors is an integer number (4003144920).

Almost surely, 2^12009434757 is an apocalyptic number.

It is an amenable number.

12009434757 is a deficient number, since it is larger than the sum of its proper divisors (4003144923).

12009434757 is an equidigital number, since it uses as much as digits as its factorization.

12009434757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003144922.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 12009434757 in words is "twelve billion, nine million, four hundred thirty-four thousand, seven hundred fifty-seven".