19928991019 has 8 divisors (see below), whose sum is σ = 22808119520. Its totient is φ = 17057894976.

The previous prime is 19928990993. The next prime is 19928991041. The reversal of 19928991019 is 91019982991.

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 19928991019 - 2⁷ = 19928990891 is a prime.

It is a super-2 number, since 2×19928991019² (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 (19928991419) by changing a digit.

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, 2002794 + ... + 2012719.

It is an arithmetic number, because the mean of its divisors is an integer number (2851014940).

Almost surely, 2^19928991019 is an apocalyptic number.

19928991019 is a deficient number, since it is larger than the sum of its proper divisors (2879128501).

19928991019 is an equidigital number, since it uses as much as digits as its factorization.

19928991019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016229.

The product of its (nonzero) digits is 944784, while the sum is 58.

The spelling of 19928991019 in words is "nineteen billion, nine hundred twenty-eight million, nine hundred ninety-one thousand, nineteen".