18412126213 has 4 divisors (see below), whose sum is σ = 19828443628. Its totient is φ = 16995808800.

The previous prime is 18412126193. The next prime is 18412126217. The reversal of 18412126213 is 31262121481.

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 1975091364 + 16437034849 = 44442^2 + 128207^2 .

It is a cyclic number.

It is not a de Polignac number, because 18412126213 - 2⁵ = 18412126181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18412126217) 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, 708158688 + ... + 708158713.

It is an arithmetic number, because the mean of its divisors is an integer number (4957110907).

Almost surely, 2^18412126213 is an apocalyptic number.

18412126213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18412126213 is a deficient number, since it is larger than the sum of its proper divisors (1416317415).

18412126213 is a wasteful number, since it uses less digits than its factorization.

18412126213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416317414.

The product of its digits is 4608, while the sum is 31.

Adding to 18412126213 its reverse (31262121481), we get a palindrome (49674247694).

The spelling of 18412126213 in words is "eighteen billion, four hundred twelve million, one hundred twenty-six thousand, two hundred thirteen".