19930357719 has 28 divisors (see below), whose sum is σ = 29893357632. Its totient is φ = 13281796800.

The previous prime is 19930357717. The next prime is 19930357787. The reversal of 19930357719 is 91775303991.

It is a happy number.

19930357719 is a `hidden beast` number, since 199 + 30 + 357 + 71 + 9 = 666.

It is not a de Polignac number, because 19930357719 - 2¹ = 19930357717 is a prime.

It is a super-2 number, since 2×19930357719² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19930357717) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3438714 + ... + 3444504.

Almost surely, 2^19930357719 is an apocalyptic number.

19930357719 is a deficient number, since it is larger than the sum of its proper divisors (9962999913).

19930357719 is an frugal number, since it uses more digits than its factorization.

19930357719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530 (or 10515 counting only the distinct ones).

The product of its (nonzero) digits is 1607445, while the sum is 54.

The spelling of 19930357719 in words is "nineteen billion, nine hundred thirty million, three hundred fifty-seven thousand, seven hundred nineteen".