19621322319 has 16 divisors (see below), whose sum is σ = 26557901568. Its totient is φ = 12882895872.

The previous prime is 19621322243. The next prime is 19621322359. The reversal of 19621322319 is 91322312691.

It is a de Polignac number, because none of the positive numbers 2^k-19621322319 is a prime.

It is a super-2 number, since 2×19621322319² (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 (19621322359) 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 15 ways as a sum of consecutive naturals, for example, 1425679 + ... + 1439375.

It is an arithmetic number, because the mean of its divisors is an integer number (1659868848).

Almost surely, 2^19621322319 is an apocalyptic number.

19621322319 is a deficient number, since it is larger than the sum of its proper divisors (6936579249).

19621322319 is a wasteful number, since it uses less digits than its factorization.

19621322319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20894.

The product of its digits is 34992, while the sum is 39.

The spelling of 19621322319 in words is "nineteen billion, six hundred twenty-one million, three hundred twenty-two thousand, three hundred nineteen".