7812421418 has 16 divisors (see below), whose sum is σ = 12131009280. Its totient is φ = 3768935856.

The previous prime is 7812421411. The next prime is 7812421433. The reversal of 7812421418 is 8141242187.

It is a super-2 number, since 2×7812421418² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7812421411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40955 + ... + 131537.

It is an arithmetic number, because the mean of its divisors is an integer number (758188080).

Almost surely, 2^7812421418 is an apocalyptic number.

7812421418 is a deficient number, since it is larger than the sum of its proper divisors (4318587862).

7812421418 is a wasteful number, since it uses less digits than its factorization.

7812421418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92101.

The product of its digits is 28672, while the sum is 38.

The square root of 7812421418 is about 88387.9031202800. The cubic root of 7812421418 is about 1984.2446620766.

The spelling of 7812421418 in words is "seven billion, eight hundred twelve million, four hundred twenty-one thousand, four hundred eighteen".