19730842 has 8 divisors (see below), whose sum is σ = 30396276. Its totient is φ = 9598752.

The previous prime is 19730833. The next prime is 19730857. The reversal of 19730842 is 24803791.

It can be written as a sum of positive squares in 2 ways, for example, as 15358561 + 4372281 = 3919^2 + 2091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19730842² = 778612252057928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19730798 and 19730807.

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 3 ways as a sum of consecutive naturals, for example, 133243 + ... + 133390.

Almost surely, 2^19730842 is an apocalyptic number.

19730842 is a deficient number, since it is larger than the sum of its proper divisors (10665434).

19730842 is a wasteful number, since it uses less digits than its factorization.

19730842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266672.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 19730842 is about 4441.9412422949. The cubic root of 19730842 is about 270.2185792879.

The spelling of 19730842 in words is "nineteen million, seven hundred thirty thousand, eight hundred forty-two".