19500056 has 8 divisors (see below), whose sum is σ = 36562620. Its totient is φ = 9750024.

The previous prime is 19500049. The next prime is 19500059. The reversal of 19500056 is 65000591.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 19499998 and 19500034.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19500059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1218746 + ... + 1218761.

Almost surely, 2^19500056 is an apocalyptic number.

It is an amenable number.

19500056 is a deficient number, since it is larger than the sum of its proper divisors (17062564).

19500056 is a wasteful number, since it uses less digits than its factorization.

19500056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437513 (or 2437509 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 19500056 is about 4415.8867739108. The cubic root of 19500056 is about 269.1608882622.

The spelling of 19500056 in words is "nineteen million, five hundred thousand, fifty-six".