19890353329 has 64 divisors (see below), whose sum is σ = 26652229632. Its totient is φ = 14395276800.

The previous prime is 19890353323. The next prime is 19890353339. The reversal of 19890353329 is 92335309891.

It is a cyclic number.

It is not a de Polignac number, because 19890353329 - 2⁵ = 19890353297 is a prime.

It is a super-2 number, since 2×19890353329² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19890353323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5488212 + ... + 5491834.

It is an arithmetic number, because the mean of its divisors is an integer number (416441088).

Almost surely, 2^19890353329 is an apocalyptic number.

It is an amenable number.

19890353329 is a deficient number, since it is larger than the sum of its proper divisors (6761876303).

19890353329 is a wasteful number, since it uses less digits than its factorization.

19890353329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3766.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The spelling of 19890353329 in words is "nineteen billion, eight hundred ninety million, three hundred fifty-three thousand, three hundred twenty-nine".