19144392823 has 4 divisors (see below), whose sum is σ = 19241572680. Its totient is φ = 19047212968.

The previous prime is 19144392797. The next prime is 19144392853. The reversal of 19144392823 is 32829344191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19144392823 - 2²¹ = 19142295671 is a prime.

It is a super-2 number, since 2×19144392823² (a number of 21 digits) contains 22 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 (19144392853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48589633 + ... + 48590026.

It is an arithmetic number, because the mean of its divisors is an integer number (4810393170).

Almost surely, 2^19144392823 is an apocalyptic number.

19144392823 is a deficient number, since it is larger than the sum of its proper divisors (97179857).

19144392823 is an equidigital number, since it uses as much as digits as its factorization.

19144392823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97179856.

The product of its digits is 373248, while the sum is 46.

The spelling of 19144392823 in words is "nineteen billion, one hundred forty-four million, three hundred ninety-two thousand, eight hundred twenty-three".