19927216 has 10 divisors (see below), whose sum is σ = 38609012. Its totient is φ = 9963600.

The previous prime is 19927183. The next prime is 19927217. The reversal of 19927216 is 61272991.

It is not an unprimeable number, because it can be changed into a prime (19927217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622710 + ... + 622741.

Almost surely, 2^19927216 is an apocalyptic number.

19927216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19927216 is a deficient number, since it is larger than the sum of its proper divisors (18681796).

19927216 is a wasteful number, since it uses less digits than its factorization.

19927216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245459 (or 1245453 counting only the distinct ones).

The product of its digits is 13608, while the sum is 37.

The square root of 19927216 is about 4463.9910394175. The cubic root of 19927216 is about 271.1120844621.

The spelling of 19927216 in words is "nineteen million, nine hundred twenty-seven thousand, two hundred sixteen".