19799823 has 8 divisors (see below), whose sum is σ = 27013888. Its totient is φ = 12892824.

The previous prime is 19799797. The next prime is 19799827. The reversal of 19799823 is 32899791.

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

It is not a de Polignac number, because 19799823 - 2¹⁶ = 19734287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19799827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76615 + ... + 76872.

It is an arithmetic number, because the mean of its divisors is an integer number (3376736).

Almost surely, 2^19799823 is an apocalyptic number.

19799823 is a deficient number, since it is larger than the sum of its proper divisors (7214065).

19799823 is a wasteful number, since it uses less digits than its factorization.

19799823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153533.

The product of its digits is 244944, while the sum is 48.

The square root of 19799823 is about 4449.6992033170. The cubic root of 19799823 is about 270.5331167607.

The spelling of 19799823 in words is "nineteen million, seven hundred ninety-nine thousand, eight hundred twenty-three".