19214909 has 12 divisors (see below), whose sum is σ = 23529600. Its totient is φ = 15602328.

The previous prime is 19214903. The next prime is 19214917. The reversal of 19214909 is 90941291.

It is not a de Polignac number, because 19214909 - 2⁸ = 19214653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19214903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9389 + ... + 11250.

It is an arithmetic number, because the mean of its divisors is an integer number (1960800).

Almost surely, 2^19214909 is an apocalyptic number.

19214909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19214909 is a deficient number, since it is larger than the sum of its proper divisors (4314691).

19214909 is a wasteful number, since it uses less digits than its factorization.

19214909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20672 (or 20665 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 19214909 is about 4383.4813789955. The cubic root of 19214909 is about 267.8424716553.

The spelling of 19214909 in words is "nineteen million, two hundred fourteen thousand, nine hundred nine".