19023139 has 8 divisors (see below), whose sum is σ = 20335392. Its totient is φ = 17751360.

The previous prime is 19023107. The next prime is 19023149. The reversal of 19023139 is 93132091.

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

It is not a de Polignac number, because 19023139 - 2⁵ = 19023107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19023149) 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, 9144 + ... + 11029.

It is an arithmetic number, because the mean of its divisors is an integer number (2541924).

Almost surely, 2^19023139 is an apocalyptic number.

19023139 is a deficient number, since it is larger than the sum of its proper divisors (1312253).

19023139 is a wasteful number, since it uses less digits than its factorization.

19023139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20237.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 19023139 is about 4361.5523612585. The cubic root of 19023139 is about 266.9484439912.

It can be divided in two parts, 1902 and 3139, that added together give a square (5041 = 71²).

The spelling of 19023139 in words is "nineteen million, twenty-three thousand, one hundred thirty-nine".