19461242881 has 8 divisors (see below), whose sum is σ = 20629914624. Its totient is φ = 18295225920.

The previous prime is 19461242863. The next prime is 19461242887. The reversal of 19461242881 is 18824216491.

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

It is not a de Polignac number, because 19461242881 - 2⁷ = 19461242753 is a prime.

It is a super-2 number, since 2×19461242881² (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 (19461242887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648585 + ... + 677926.

It is an arithmetic number, because the mean of its divisors is an integer number (2578739328).

Almost surely, 2^19461242881 is an apocalyptic number.

It is an amenable number.

19461242881 is a deficient number, since it is larger than the sum of its proper divisors (1168671743).

19461242881 is a wasteful number, since it uses less digits than its factorization.

19461242881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327391.

The product of its digits is 221184, while the sum is 46.

The spelling of 19461242881 in words is "nineteen billion, four hundred sixty-one million, two hundred forty-two thousand, eight hundred eighty-one".