19428101349 has 4 divisors (see below), whose sum is σ = 25904135136. Its totient is φ = 12952067564.

The previous prime is 19428101321. The next prime is 19428101389. The reversal of 19428101349 is 94310182491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19428101349 - 2⁸ = 19428101093 is a prime.

It is a super-2 number, since 2×19428101349² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19428101349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19428101389) 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 3 ways as a sum of consecutive naturals, for example, 3238016889 + ... + 3238016894.

It is an arithmetic number, because the mean of its divisors is an integer number (6476033784).

Almost surely, 2^19428101349 is an apocalyptic number.

It is an amenable number.

19428101349 is a deficient number, since it is larger than the sum of its proper divisors (6476033787).

19428101349 is an equidigital number, since it uses as much as digits as its factorization.

19428101349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6476033786.

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

The spelling of 19428101349 in words is "nineteen billion, four hundred twenty-eight million, one hundred one thousand, three hundred forty-nine".