19997296 has 20 divisors (see below), whose sum is σ = 42267384. Its totient is φ = 9089600.

The previous prime is 19997267. The next prime is 19997297. The reversal of 19997296 is 69279991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19997297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56635 + ... + 56986.

Almost surely, 2^19997296 is an apocalyptic number.

19997296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19997296 is an abundant number, since it is smaller than the sum of its proper divisors (22270088).

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

19997296 is a wasteful number, since it uses less digits than its factorization.

19997296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113640 (or 113634 counting only the distinct ones).

The product of its digits is 551124, while the sum is 52.

The square root of 19997296 is about 4471.8336283900. The cubic root of 19997296 is about 271.4295281328.

The spelling of 19997296 in words is "nineteen million, nine hundred ninety-seven thousand, two hundred ninety-six".