19949447 has 8 divisors (see below), whose sum is σ = 22826496. Its totient is φ = 17079192.

The previous prime is 19949431. The next prime is 19949453. The reversal of 19949447 is 74494991.

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

It is a cyclic number.

It is not a de Polignac number, because 19949447 - 2⁴ = 19949431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19949467) 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, 9878 + ... + 11724.

It is an arithmetic number, because the mean of its divisors is an integer number (2853312).

Almost surely, 2^19949447 is an apocalyptic number.

19949447 is a deficient number, since it is larger than the sum of its proper divisors (2877049).

19949447 is a wasteful number, since it uses less digits than its factorization.

19949447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397.

The product of its digits is 326592, while the sum is 47.

The square root of 19949447 is about 4466.4803816876. The cubic root of 19949447 is about 271.2128654382.

The spelling of 19949447 in words is "nineteen million, nine hundred forty-nine thousand, four hundred forty-seven".