19694668 has 18 divisors (see below), whose sum is σ = 40093116. Its totient is φ = 8440488.

The previous prime is 19694663. The next prime is 19694677. The reversal of 19694668 is 86649691.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (19694663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50046 + ... + 50437.

Almost surely, 2^19694668 is an apocalyptic number.

It is an amenable number.

19694668 is an abundant number, since it is smaller than the sum of its proper divisors (20398448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19694668 is a wasteful number, since it uses less digits than its factorization.

19694668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100501 (or 100492 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 19694668 is about 4437.8675059087. The cubic root of 19694668 is about 270.0533410845.

It can be divided in two parts, 196 and 94668, that added together give a square (94864 = 308²).

The spelling of 19694668 in words is "nineteen million, six hundred ninety-four thousand, six hundred sixty-eight".