919931816 has 32 divisors (see below), whose sum is σ = 1821144000. Its totient is φ = 434439936.

The previous prime is 919931813. The next prime is 919931833. The reversal of 919931816 is 618139919.

919931816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (919931813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42245 + ... + 60203.

It is an arithmetic number, because the mean of its divisors is an integer number (56910750).

Almost surely, 2^919931816 is an apocalyptic number.

It is an amenable number.

919931816 is a deficient number, since it is larger than the sum of its proper divisors (901212184).

919931816 is a wasteful number, since it uses less digits than its factorization.

919931816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18321 (or 18317 counting only the distinct ones).

The product of its digits is 104976, while the sum is 47.

The square root of 919931816 is about 30330.3777754251. The cubic root of 919931816 is about 972.5647984526.

The spelling of 919931816 in words is "nine hundred nineteen million, nine hundred thirty-one thousand, eight hundred sixteen".