19339993 has 4 divisors (see below), whose sum is σ = 19355008. Its totient is φ = 19324980.

The previous prime is 19339949. The next prime is 19340029. The reversal of 19339993 is 39993391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39993391 = 97 ⋅412303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19339993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19339933) 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 3 ways as a sum of consecutive naturals, for example, 5373 + ... + 8218.

It is an arithmetic number, because the mean of its divisors is an integer number (4838752).

Almost surely, 2^19339993 is an apocalyptic number.

It is an amenable number.

19339993 is a deficient number, since it is larger than the sum of its proper divisors (15015).

19339993 is a wasteful number, since it uses less digits than its factorization.

19339993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15014.

The product of its digits is 177147, while the sum is 46.

The square root of 19339993 is about 4397.7258895934. The cubic root of 19339993 is about 268.4224097188.

It can be divided in two parts, 193 and 39993, that added together give a triangular number (40186 = T₂₈₃).

The spelling of 19339993 in words is "nineteen million, three hundred thirty-nine thousand, nine hundred ninety-three".