19212449195 has 8 divisors (see below), whose sum is σ = 23123353344. Its totient is φ = 15324349824.

The previous prime is 19212449189. The next prime is 19212449197. The reversal of 19212449195 is 59194421291.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19212449195 is a prime.

It is a super-2 number, since 2×19212449195² (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 (19212449197) by changing a digit.

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, 5699339 + ... + 5702708.

It is an arithmetic number, because the mean of its divisors is an integer number (2890419168).

Almost surely, 2^19212449195 is an apocalyptic number.

19212449195 is a deficient number, since it is larger than the sum of its proper divisors (3910904149).

19212449195 is a wasteful number, since it uses less digits than its factorization.

19212449195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11402389.

The product of its digits is 233280, while the sum is 47.

The spelling of 19212449195 in words is "nineteen billion, two hundred twelve million, four hundred forty-nine thousand, one hundred ninety-five".