19709668 has 24 divisors (see below), whose sum is σ = 38001600. Its totient is φ = 8869920.

The previous prime is 19709663. The next prime is 19709687. The reversal of 19709668 is 86690791.

It is not an unprimeable number, because it can be changed into a prime (19709663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2358 + ... + 6706.

It is an arithmetic number, because the mean of its divisors is an integer number (1583400).

Almost surely, 2^19709668 is an apocalyptic number.

It is an amenable number.

19709668 is a deficient number, since it is larger than the sum of its proper divisors (18291932).

19709668 is a wasteful number, since it uses less digits than its factorization.

19709668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467 (or 4465 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 19709668 is about 4439.5571851256. The cubic root of 19709668 is about 270.1218836997.

The spelling of 19709668 in words is "nineteen million, seven hundred nine thousand, six hundred sixty-eight".