19823139 has 48 divisors (see below), whose sum is σ = 35223552. Its totient is φ = 10485504.

The previous prime is 19823123. The next prime is 19823149. The reversal of 19823139 is 93132891.

It is not a de Polignac number, because 19823139 - 2⁴ = 19823123 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (19823149) 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 47 ways as a sum of consecutive naturals, for example, 88782 + ... + 89004.

It is an arithmetic number, because the mean of its divisors is an integer number (733824).

Almost surely, 2^19823139 is an apocalyptic number.

19823139 is a deficient number, since it is larger than the sum of its proper divisors (15400413).

19823139 is a wasteful number, since it uses less digits than its factorization.

19823139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 333 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 19823139 is about 4452.3183848418. The cubic root of 19823139 is about 270.6392671338.

The spelling of 19823139 in words is "nineteen million, eight hundred twenty-three thousand, one hundred thirty-nine".