19868416 has 18 divisors (see below), whose sum is σ = 39659732. Its totient is φ = 9934080.

The previous prime is 19868399. The next prime is 19868423. The reversal of 19868416 is 61486891.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38550 + ... + 39061.

Almost surely, 2^19868416 is an apocalyptic number.

19868416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19868416 is a deficient number, since it is larger than the sum of its proper divisors (19791316).

19868416 is an frugal number, since it uses more digits than its factorization.

19868416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77627 (or 77613 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 19868416 is about 4457.4001390945. The cubic root of 19868416 is about 270.8451614768.

The spelling of 19868416 in words is "nineteen million, eight hundred sixty-eight thousand, four hundred sixteen".