19019430659 has 4 divisors (see below), whose sum is σ = 19019799216. Its totient is φ = 19019062104.

The previous prime is 19019430637. The next prime is 19019430691. The reversal of 19019430659 is 95603491091.

It is a happy number.

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 19019430659 - 2¹² = 19019426563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19019433659) 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, 91199 + ... + 215304.

It is an arithmetic number, because the mean of its divisors is an integer number (4754949804).

Almost surely, 2^19019430659 is an apocalyptic number.

19019430659 is a deficient number, since it is larger than the sum of its proper divisors (368557).

19019430659 is an equidigital number, since it uses as much as digits as its factorization.

19019430659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368556.

The product of its (nonzero) digits is 262440, while the sum is 47.

The spelling of 19019430659 in words is "nineteen billion, nineteen million, four hundred thirty thousand, six hundred fifty-nine".