19621921119 has 4 divisors (see below), whose sum is σ = 26162561496. Its totient is φ = 13081280744.

The previous prime is 19621921103. The next prime is 19621921127. The reversal of 19621921119 is 91112912691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91112912691 = 3 ⋅30370970897.

It is a cyclic number.

It is not a de Polignac number, because 19621921119 - 2⁴ = 19621921103 is a prime.

It is a super-2 number, since 2×19621921119² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19621921139) 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 3 ways as a sum of consecutive naturals, for example, 3270320184 + ... + 3270320189.

It is an arithmetic number, because the mean of its divisors is an integer number (6540640374).

Almost surely, 2^19621921119 is an apocalyptic number.

19621921119 is a deficient number, since it is larger than the sum of its proper divisors (6540640377).

19621921119 is an equidigital number, since it uses as much as digits as its factorization.

19621921119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540640376.

The product of its digits is 17496, while the sum is 42.

The spelling of 19621921119 in words is "nineteen billion, six hundred twenty-one million, nine hundred twenty-one thousand, one hundred nineteen".