19794448612390 has 16 divisors (see below), whose sum is σ = 35693293493808. Its totient is φ = 7903715891296.

The previous prime is 19794448612387. The next prime is 19794448612423. The reversal of 19794448612390 is 9321684449791.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1757938297 + ... + 1757949556.

It is an arithmetic number, because the mean of its divisors is an integer number (2230830843363).

Almost surely, 2^{19794448612390} is an apocalyptic number.

19794448612390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19794448612390 is a deficient number, since it is larger than the sum of its proper divisors (15898844881418).

19794448612390 is a wasteful number, since it uses less digits than its factorization.

19794448612390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515888423.

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 19794448612390 in words is "nineteen trillion, seven hundred ninety-four billion, four hundred forty-eight million, six hundred twelve thousand, three hundred ninety".