19452534619 has 4 divisors (see below), whose sum is σ = 22231468144. Its totient is φ = 16673601096.

The previous prime is 19452534613. The next prime is 19452534667. The reversal of 19452534619 is 91643525491.

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 19452534619 - 2⁹ = 19452534107 is a prime.

It is a super-2 number, since 2×19452534619² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19452534613) 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, 1389466752 + ... + 1389466765.

It is an arithmetic number, because the mean of its divisors is an integer number (5557867036).

Almost surely, 2^19452534619 is an apocalyptic number.

19452534619 is a deficient number, since it is larger than the sum of its proper divisors (2778933525).

19452534619 is an equidigital number, since it uses as much as digits as its factorization.

19452534619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778933524.

The product of its digits is 1166400, while the sum is 49.

The spelling of 19452534619 in words is "nineteen billion, four hundred fifty-two million, five hundred thirty-four thousand, six hundred nineteen".