19946128 has 20 divisors (see below), whose sum is σ = 39003580. Its totient is φ = 9880704.

The previous prime is 19946119. The next prime is 19946153. The reversal of 19946128 is 82164991.

It can be written as a sum of positive squares in 2 ways, for example, as 9909904 + 10036224 = 3148^2 + 3168^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3975 + ... + 7462.

It is an arithmetic number, because the mean of its divisors is an integer number (1950179).

Almost surely, 2^19946128 is an apocalyptic number.

It is an amenable number.

19946128 is a deficient number, since it is larger than the sum of its proper divisors (19057452).

19946128 is a wasteful number, since it uses less digits than its factorization.

19946128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11554 (or 11548 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 19946128 is about 4466.1088208865. The cubic root of 19946128 is about 271.1978239950.

The spelling of 19946128 in words is "nineteen million, nine hundred forty-six thousand, one hundred twenty-eight".