19985361 has 8 divisors (see below), whose sum is σ = 29069664. Its totient is φ = 12112320.

The previous prime is 19985351. The next prime is 19985401. The reversal of 19985361 is 16358991.

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

It is not a de Polignac number, because 19985361 - 2⁹ = 19984849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19985311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302776 + ... + 302841.

It is an arithmetic number, because the mean of its divisors is an integer number (3633708).

Almost surely, 2^19985361 is an apocalyptic number.

19985361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19985361 is a deficient number, since it is larger than the sum of its proper divisors (9084303).

19985361 is a wasteful number, since it uses less digits than its factorization.

19985361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605631.

The product of its digits is 58320, while the sum is 42.

The square root of 19985361 is about 4470.4989654400. The cubic root of 19985361 is about 271.3755182288.

The spelling of 19985361 in words is "nineteen million, nine hundred eighty-five thousand, three hundred sixty-one".