19785850 has 24 divisors (see below), whose sum is σ = 42059808. Its totient is φ = 6783600.

The previous prime is 19785839. The next prime is 19785851. The reversal of 19785850 is 5858791.

It is a junction number, because it is equal to n+sod(n) for n = 19785797 and 19785806.

It is not an unprimeable number, because it can be changed into a prime (19785851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27916 + ... + 28615.

It is an arithmetic number, because the mean of its divisors is an integer number (1752492).

Almost surely, 2^19785850 is an apocalyptic number.

19785850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19785850 is an abundant number, since it is smaller than the sum of its proper divisors (22273958).

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

19785850 is a wasteful number, since it uses less digits than its factorization.

19785850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56550 (or 56545 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 19785850 is about 4448.1288200770. The cubic root of 19785850 is about 270.4694621710.

The spelling of 19785850 in words is "nineteen million, seven hundred eighty-five thousand, eight hundred fifty".