19309742641 has 8 divisors (see below), whose sum is σ = 22190202944. Its totient is φ = 16459763760.

The previous prime is 19309742633. The next prime is 19309742657. The reversal of 19309742641 is 14624790391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19309742641 - 2³ = 19309742633 is a prime.

It is the 138960-th Hogben number.

It is a junction number, because it is equal to n+sod(n) for n = 19309742591 and 19309742600.

It is not an unprimeable number, because it can be changed into a prime (19309742611) by changing a digit.

It is a nontrivial repunit in base 138959.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7618995 + ... + 7621528.

It is an arithmetic number, because the mean of its divisors is an integer number (2773775368).

Almost surely, 2^19309742641 is an apocalyptic number.

It is an amenable number.

19309742641 is a deficient number, since it is larger than the sum of its proper divisors (2880460303).

19309742641 is a wasteful number, since it uses less digits than its factorization.

19309742641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15240711.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 19309742641 in words is "nineteen billion, three hundred nine million, seven hundred forty-two thousand, six hundred forty-one".