12342156205 has 4 divisors (see below), whose sum is σ = 14810587452. Its totient is φ = 9873724960.

The previous prime is 12342156199. The next prime is 12342156283. The reversal of 12342156205 is 50265124321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1819704964 + 10522451241 = 42658^2 + 102579^2 .

It is not a de Polignac number, because 12342156205 - 2¹⁹ = 12341631917 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, 1234215616 + ... + 1234215625.

It is an arithmetic number, because the mean of its divisors is an integer number (3702646863).

Almost surely, 2^12342156205 is an apocalyptic number.

It is an amenable number.

12342156205 is a deficient number, since it is larger than the sum of its proper divisors (2468431247).

12342156205 is an equidigital number, since it uses as much as digits as its factorization.

12342156205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468431246.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 12342156205 in words is "twelve billion, three hundred forty-two million, one hundred fifty-six thousand, two hundred five".