19101428439 has 4 divisors (see below), whose sum is σ = 25468571256. Its totient is φ = 12734285624.

The previous prime is 19101428387. The next prime is 19101428443. The reversal of 19101428439 is 93482410191.

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 19101428439 - 2⁸ = 19101428183 is a prime.

It is a super-3 number, since 3×19101428439³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19101428439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19101428039) 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 3 ways as a sum of consecutive naturals, for example, 3183571404 + ... + 3183571409.

It is an arithmetic number, because the mean of its divisors is an integer number (6367142814).

Almost surely, 2^19101428439 is an apocalyptic number.

19101428439 is a deficient number, since it is larger than the sum of its proper divisors (6367142817).

19101428439 is an equidigital number, since it uses as much as digits as its factorization.

19101428439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6367142816.

The product of its (nonzero) digits is 62208, while the sum is 42.

It can be divided in two parts, 191014 and 28439, that added together give a triangular number (219453 = T₆₆₂).

The spelling of 19101428439 in words is "nineteen billion, one hundred one million, four hundred twenty-eight thousand, four hundred thirty-nine".