7218134036 has 12 divisors (see below), whose sum is σ = 12654416628. Its totient is φ = 3602586432.

The previous prime is 7218133997. The next prime is 7218134039. The reversal of 7218134036 is 6304318127.

It can be written as a sum of positive squares in 2 ways, for example, as 1282356100 + 5935777936 = 35810^2 + 77044^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7218133987 and 7218134005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218134039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1617641 + ... + 1622096.

It is an arithmetic number, because the mean of its divisors is an integer number (1054534719).

Almost surely, 2^7218134036 is an apocalyptic number.

It is an amenable number.

7218134036 is a deficient number, since it is larger than the sum of its proper divisors (5436282592).

7218134036 is a wasteful number, since it uses less digits than its factorization.

7218134036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240298 (or 3240296 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 7218134036 is about 84959.6023766590. The cubic root of 7218134036 is about 1932.5985415226.

The spelling of 7218134036 in words is "seven billion, two hundred eighteen million, one hundred thirty-four thousand, thirty-six".