19797424 has 40 divisors (see below), whose sum is σ = 39809952. Its totient is φ = 9530880.

The previous prime is 19797419. The next prime is 19797431. The reversal of 19797424 is 42479791.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 67422 + ... + 67714.

Almost surely, 2^19797424 is an apocalyptic number.

It is an amenable number.

19797424 is an abundant number, since it is smaller than the sum of its proper divisors (20012528).

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

19797424 is a wasteful number, since it uses less digits than its factorization.

19797424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 439 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 19797424 is about 4449.4296263679. The cubic root of 19797424 is about 270.5221901451.

The spelling of 19797424 in words is "nineteen million, seven hundred ninety-seven thousand, four hundred twenty-four".