19794816 has 48 divisors (see below), whose sum is σ = 56964960. Its totient is φ = 6597888.

The previous prime is 19794809. The next prime is 19794821. The reversal of 19794816 is 61849791.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7440 + ... + 9743.

It is an arithmetic number, because the mean of its divisors is an integer number (1186770).

Almost surely, 2^19794816 is an apocalyptic number.

19794816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19794816 is an abundant number, since it is smaller than the sum of its proper divisors (37170144).

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

19794816 is a wasteful number, since it uses less digits than its factorization.

19794816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17203 (or 17188 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 19794816 is about 4449.1365454434. The cubic root of 19794816 is about 270.5103106054.

The spelling of 19794816 in words is "nineteen million, seven hundred ninety-four thousand, eight hundred sixteen".