19419426849 has 8 divisors (see below), whose sum is σ = 25964694720. Its totient is φ = 12910221776.

The previous prime is 19419426841. The next prime is 19419426883. The reversal of 19419426849 is 94862491491.

It is a happy number.

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 19419426849 - 2³ = 19419426841 is a prime.

It is a super-2 number, since 2×19419426849² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19419426841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9014442 + ... + 9016595.

It is an arithmetic number, because the mean of its divisors is an integer number (3245586840).

Almost surely, 2^19419426849 is an apocalyptic number.

It is an amenable number.

19419426849 is a deficient number, since it is larger than the sum of its proper divisors (6545267871).

19419426849 is a wasteful number, since it uses less digits than its factorization.

19419426849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18031399.

The product of its digits is 4478976, while the sum is 57.

The spelling of 19419426849 in words is "nineteen billion, four hundred nineteen million, four hundred twenty-six thousand, eight hundred forty-nine".