19993056 has 24 divisors (see below), whose sum is σ = 52482024. Its totient is φ = 6664320.

The previous prime is 19993013. The next prime is 19993087. The reversal of 19993056 is 65039991.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 19992999 and 19993017.

It is a congruent number.

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, 104035 + ... + 104226.

It is an arithmetic number, because the mean of its divisors is an integer number (2186751).

Almost surely, 2^19993056 is an apocalyptic number.

19993056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19993056 is an abundant number, since it is smaller than the sum of its proper divisors (32488968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19993056 is a wasteful number, since it uses less digits than its factorization.

19993056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208274 (or 208266 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 19993056 is about 4471.3595247978. The cubic root of 19993056 is about 271.4103431632.

The spelling of 19993056 in words is "nineteen million, nine hundred ninety-three thousand, fifty-six".