1918966688 has 12 divisors (see below), whose sum is σ = 3777965730. Its totient is φ = 959483328.

The previous prime is 1918966669. The next prime is 1918966697. The reversal of 1918966688 is 8866698191.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1895035024 + 23931664 = 43532^2 + 4892^2 .

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1918966688.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29983823 + ... + 29983886.

Almost surely, 2^1918966688 is an apocalyptic number.

It is an amenable number.

1918966688 is a deficient number, since it is larger than the sum of its proper divisors (1858999042).

1918966688 is an equidigital number, since it uses as much as digits as its factorization.

1918966688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59967719 (or 59967711 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 62.

The square root of 1918966688 is about 43806.0120074859. The cubic root of 1918966688 is about 1242.6699942707.

The spelling of 1918966688 in words is "one billion, nine hundred eighteen million, nine hundred sixty-six thousand, six hundred eighty-eight".