19914389 has 8 divisors (see below), whose sum is σ = 22669632. Its totient is φ = 17316640.

The previous prime is 19914371. The next prime is 19914449. The reversal of 19914389 is 98341991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19914389 - 2⁸ = 19914133 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 (19914589) 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, 39104 + ... + 39609.

It is an arithmetic number, because the mean of its divisors is an integer number (2833704).

Almost surely, 2^19914389 is an apocalyptic number.

It is an amenable number.

19914389 is a deficient number, since it is larger than the sum of its proper divisors (2755243).

19914389 is a wasteful number, since it uses less digits than its factorization.

19914389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78747.

The product of its digits is 69984, while the sum is 44.

The square root of 19914389 is about 4462.5540893081. The cubic root of 19914389 is about 271.0539010354.

The spelling of 19914389 in words is "nineteen million, nine hundred fourteen thousand, three hundred eighty-nine".