19481693 has 12 divisors (see below), whose sum is σ = 24337248. Its totient is φ = 15150360.

The previous prime is 19481681. The next prime is 19481699. The reversal of 19481693 is 39618491.

It is a de Polignac number, because none of the positive numbers 2^k-19481693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19481693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19481699) 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 in 11 ways as a sum of consecutive naturals, for example, 38480 + ... + 38982.

It is an arithmetic number, because the mean of its divisors is an integer number (2028104).

Almost surely, 2^19481693 is an apocalyptic number.

It is an amenable number.

19481693 is a deficient number, since it is larger than the sum of its proper divisors (4855555).

19481693 is an frugal number, since it uses more digits than its factorization.

19481693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024 (or 521 counting only the distinct ones).

The product of its digits is 46656, while the sum is 41.

The square root of 19481693 is about 4413.8070868582. The cubic root of 19481693 is about 269.0763730575.

The spelling of 19481693 in words is "nineteen million, four hundred eighty-one thousand, six hundred ninety-three".