19693423 has 8 divisors (see below), whose sum is σ = 20445120. Its totient is φ = 18955680.

The previous prime is 19693417. The next prime is 19693439. The reversal of 19693423 is 32439691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19693423 is a prime.

It is a super-4 number, since 4×19693423⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19697423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568 + ... + 6301.

It is an arithmetic number, because the mean of its divisors is an integer number (2555640).

Almost surely, 2^19693423 is an apocalyptic number.

19693423 is a deficient number, since it is larger than the sum of its proper divisors (751697).

19693423 is an equidigital number, since it uses as much as digits as its factorization.

19693423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6977.

The product of its digits is 34992, while the sum is 37.

The square root of 19693423 is about 4437.7272336186. The cubic root of 19693423 is about 270.0476504835.

The spelling of 19693423 in words is "nineteen million, six hundred ninety-three thousand, four hundred twenty-three".