19668029 has 2 divisors, whose sum is σ = 19668030. Its totient is φ = 19668028.

The previous prime is 19668023. The next prime is 19668037. The reversal of 19668029 is 92086691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10876804 + 8791225 = 3298^2 + 2965^2 .

It is a cyclic number.

It is not a de Polignac number, because 19668029 - 2⁸ = 19667773 is a prime.

It is a super-3 number, since 3×19668029³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19668023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9834014 + 9834015.

It is an arithmetic number, because the mean of its divisors is an integer number (9834015).

Almost surely, 2^19668029 is an apocalyptic number.

It is an amenable number.

19668029 is a deficient number, since it is larger than the sum of its proper divisors (1).

19668029 is an equidigital number, since it uses as much as digits as its factorization.

19668029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 19668029 is about 4434.8651614226. The cubic root of 19668029 is about 269.9315281331.

The spelling of 19668029 in words is "nineteen million, six hundred sixty-eight thousand, twenty-nine".