19450342081 has 8 divisors (see below), whose sum is σ = 20300486400. Its totient is φ = 18600570912.

The previous prime is 19450342063. The next prime is 19450342099. The reversal of 19450342081 is 18024305491.

It is an interprime number because it is at equal distance from previous prime (19450342063) and next prime (19450342099).

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 19450342081 - 2⁵ = 19450342049 is a prime.

It is a super-2 number, since 2×19450342081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19450342081.

It is not an unprimeable number, because it can be changed into a prime (19450342031) 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, 15976 + ... + 197878.

It is an arithmetic number, because the mean of its divisors is an integer number (2537560800).

Almost surely, 2^19450342081 is an apocalyptic number.

It is an amenable number.

19450342081 is a deficient number, since it is larger than the sum of its proper divisors (850144319).

19450342081 is a wasteful number, since it uses less digits than its factorization.

19450342081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186575.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 19450342081 in words is "nineteen billion, four hundred fifty million, three hundred forty-two thousand, eighty-one".