19447934 has 16 divisors (see below), whose sum is σ = 32365440. Its totient is φ = 8689560.

The previous prime is 19447919. The next prime is 19447937. The reversal of 19447934 is 43974491.

It is a junction number, because it is equal to n+sod(n) for n = 19447891 and 19447900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19447937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6194 + ... + 8789.

It is an arithmetic number, because the mean of its divisors is an integer number (2022840).

Almost surely, 2^19447934 is an apocalyptic number.

19447934 is a deficient number, since it is larger than the sum of its proper divisors (12917506).

19447934 is a wasteful number, since it uses less digits than its factorization.

19447934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15055.

The product of its digits is 108864, while the sum is 41.

The square root of 19447934 is about 4409.9811790982. The cubic root of 19447934 is about 268.9208595149.

The spelling of 19447934 in words is "nineteen million, four hundred forty-seven thousand, nine hundred thirty-four".