19465221805642 has 8 divisors (see below), whose sum is σ = 29197952030016. Its totient is φ = 9732571128972.

The previous prime is 19465221805639. The next prime is 19465221805643. The reversal of 19465221805642 is 24650812256491.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (19465221805643) 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 3 ways as a sum of consecutive naturals, for example, 19271368 + ... + 20256259.

It is an arithmetic number, because the mean of its divisors is an integer number (3649744003752).

Almost surely, 2^{19465221805642} is an apocalyptic number.

19465221805642 is a deficient number, since it is larger than the sum of its proper divisors (9732730224374).

19465221805642 is a wasteful number, since it uses less digits than its factorization.

19465221805642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39773852.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 19465221805642 in words is "nineteen trillion, four hundred sixty-five billion, two hundred twenty-one million, eight hundred five thousand, six hundred forty-two".