19906056 has 48 divisors (see below), whose sum is σ = 54578160. Its totient is φ = 6553440.

The previous prime is 19906043. The next prime is 19906067. The reversal of 19906056 is 65060991.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 19906056.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4311 + ... + 7641.

It is an arithmetic number, because the mean of its divisors is an integer number (1137045).

Almost surely, 2^19906056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19906056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27289080).

19906056 is an abundant number, since it is smaller than the sum of its proper divisors (34672104).

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

19906056 is a wasteful number, since it uses less digits than its factorization.

19906056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426 (or 3419 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 19906056 is about 4461.6203334663. The cubic root of 19906056 is about 271.0160890581.

The spelling of 19906056 in words is "nineteen million, nine hundred six thousand, fifty-six".