19694149 has 4 divisors (see below), whose sum is σ = 19815136. Its totient is φ = 19573164.

The previous prime is 19694119. The next prime is 19694153. The reversal of 19694149 is 94149691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19694149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19694119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60249 + ... + 60574.

It is an arithmetic number, because the mean of its divisors is an integer number (4953784).

Almost surely, 2^19694149 is an apocalyptic number.

It is an amenable number.

19694149 is a deficient number, since it is larger than the sum of its proper divisors (120987).

19694149 is a wasteful number, since it uses less digits than its factorization.

19694149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120986.

The product of its digits is 69984, while the sum is 43.

The square root of 19694149 is about 4437.8090314929. The cubic root of 19694149 is about 270.0509688872.

The spelling of 19694149 in words is "nineteen million, six hundred ninety-four thousand, one hundred forty-nine".