1218372118 has 8 divisors (see below), whose sum is σ = 1832257440. Its totient is φ = 607619640.

The previous prime is 1218372107. The next prime is 1218372121. The reversal of 1218372118 is 8112738121.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 782238 + ... + 783793.

It is an arithmetic number, because the mean of its divisors is an integer number (229032180).

Almost surely, 2^1218372118 is an apocalyptic number.

1218372118 is a deficient number, since it is larger than the sum of its proper divisors (613885322).

1218372118 is a wasteful number, since it uses less digits than its factorization.

1218372118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566422.

The product of its digits is 5376, while the sum is 34.

The square root of 1218372118 is about 34905.1875514228. The cubic root of 1218372118 is about 1068.0542616925.

The spelling of 1218372118 in words is "one billion, two hundred eighteen million, three hundred seventy-two thousand, one hundred eighteen".