12418423658 has 4 divisors (see below), whose sum is σ = 18627635490. Its totient is φ = 6209211828.

The previous prime is 12418423657. The next prime is 12418423673. The reversal of 12418423658 is 85632481421.

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

It can be written as a sum of positive squares in only one way, i.e., 6255702649 + 6162721009 = 79093^2 + 78503^2 .

It is a super-2 number, since 2×12418423658² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12418423651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3104605913 + ... + 3104605916.

Almost surely, 2^12418423658 is an apocalyptic number.

12418423658 is a deficient number, since it is larger than the sum of its proper divisors (6209211832).

12418423658 is an equidigital number, since it uses as much as digits as its factorization.

12418423658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209211831.

The product of its digits is 368640, while the sum is 44.

The spelling of 12418423658 in words is "twelve billion, four hundred eighteen million, four hundred twenty-three thousand, six hundred fifty-eight".