19806966 has 12 divisors (see below), whose sum is σ = 42915132. Its totient is φ = 6602316.

The previous prime is 19806937. The next prime is 19806967. The reversal of 19806966 is 66960891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19806967) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 550176 + ... + 550211.

It is an arithmetic number, because the mean of its divisors is an integer number (3576261).

Almost surely, 2^19806966 is an apocalyptic number.

19806966 is an abundant number, since it is smaller than the sum of its proper divisors (23108166).

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

19806966 is a wasteful number, since it uses less digits than its factorization.

19806966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100395 (or 1100392 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 19806966 is about 4450.5017694638. The cubic root of 19806966 is about 270.5656454306.

It can be divided in two parts, 198069 and 66, that added together give a triangular number (198135 = T₆₂₉).

The spelling of 19806966 in words is "nineteen million, eight hundred six thousand, nine hundred sixty-six".