1918693416 has 64 divisors (see below), whose sum is σ = 5212108800. Its totient is φ = 586353600.

The previous prime is 1918693409. The next prime is 1918693433. The reversal of 1918693416 is 6143968191.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53730 + ... + 82001.

It is an arithmetic number, because the mean of its divisors is an integer number (81439200).

Almost surely, 2^1918693416 is an apocalyptic number.

It is an amenable number.

1918693416 is an abundant number, since it is smaller than the sum of its proper divisors (3293415384).

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

1918693416 is a wasteful number, since it uses less digits than its factorization.

1918693416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135790 (or 135786 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 1918693416 is about 43802.8927811851. The cubic root of 1918693416 is about 1242.6110036626.

The spelling of 1918693416 in words is "one billion, nine hundred eighteen million, six hundred ninety-three thousand, four hundred sixteen".