19668707 has 2 divisors, whose sum is σ = 19668708. Its totient is φ = 19668706.

The previous prime is 19668683. The next prime is 19668731. The reversal of 19668707 is 70786691.

It is a balanced prime because it is at equal distance from previous prime (19668683) and next prime (19668731).

It is a cyclic number.

It is not a de Polignac number, because 19668707 - 2¹² = 19664611 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19668767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9834353 + 9834354.

It is an arithmetic number, because the mean of its divisors is an integer number (9834354).

Almost surely, 2^19668707 is an apocalyptic number.

19668707 is a deficient number, since it is larger than the sum of its proper divisors (1).

19668707 is an equidigital number, since it uses as much as digits as its factorization.

19668707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 19668707 is about 4434.9416005174. The cubic root of 19668707 is about 269.9346298077.

The spelling of 19668707 in words is "nineteen million, six hundred sixty-eight thousand, seven hundred seven".