1218673914 has 32 divisors (see below), whose sum is σ = 2509569216. Its totient is φ = 394289280.

The previous prime is 1218673913. The next prime is 1218673949. The reversal of 1218673914 is 4193768121.

It is a happy number.

It is a super-2 number, since 2×1218673914² = 2970332217328158792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1218673913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35889 + ... + 61035.

It is an arithmetic number, because the mean of its divisors is an integer number (78424038).

Almost surely, 2^1218673914 is an apocalyptic number.

1218673914 is an abundant number, since it is smaller than the sum of its proper divisors (1290895302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218673914 is a wasteful number, since it uses less digits than its factorization.

1218673914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25390.

The product of its digits is 72576, while the sum is 42.

The square root of 1218673914 is about 34909.5103660879. The cubic root of 1218673914 is about 1068.1424416194.

The spelling of 1218673914 in words is "one billion, two hundred eighteen million, six hundred seventy-three thousand, nine hundred fourteen".