19999396 has 6 divisors (see below), whose sum is σ = 34998950. Its totient is φ = 9999696.

The previous prime is 19999387. The next prime is 19999411. The reversal of 19999396 is 69399991.

It can be written as a sum of positive squares in only one way, i.e., 19980900 + 18496 = 4470^2 + 136^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499921 + ... + 2499928.

Almost surely, 2^19999396 is an apocalyptic number.

It is an amenable number.

19999396 is a deficient number, since it is larger than the sum of its proper divisors (14999554).

19999396 is a wasteful number, since it uses less digits than its factorization.

19999396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999853 (or 4999851 counting only the distinct ones).

The product of its digits is 1062882, while the sum is 55.

The square root of 19999396 is about 4472.0684252368. The cubic root of 19999396 is about 271.4390291182.

The spelling of 19999396 in words is "nineteen million, nine hundred ninety-nine thousand, three hundred ninety-six".