19971376 has 10 divisors (see below), whose sum is σ = 38694572. Its totient is φ = 9985680.

The previous prime is 19971373. The next prime is 19971397. The reversal of 19971376 is 67317991.

It is not an unprimeable number, because it can be changed into a prime (19971373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624090 + ... + 624121.

Almost surely, 2^19971376 is an apocalyptic number.

19971376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19971376 is a deficient number, since it is larger than the sum of its proper divisors (18723196).

19971376 is a wasteful number, since it uses less digits than its factorization.

19971376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248219 (or 1248213 counting only the distinct ones).

The product of its digits is 71442, while the sum is 43.

The square root of 19971376 is about 4468.9345486368. The cubic root of 19971376 is about 271.3122040158.

The spelling of 19971376 in words is "nineteen million, nine hundred seventy-one thousand, three hundred seventy-six".