19992006 has 12 divisors (see below), whose sum is σ = 43316052. Its totient is φ = 6663996.

The previous prime is 19992001. The next prime is 19992029. The reversal of 19992006 is 60029991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19992001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555316 + ... + 555351.

It is an arithmetic number, because the mean of its divisors is an integer number (3609671).

Almost surely, 2^19992006 is an apocalyptic number.

19992006 is an abundant number, since it is smaller than the sum of its proper divisors (23324046).

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

19992006 is a wasteful number, since it uses less digits than its factorization.

19992006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110675 (or 1110672 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 19992006 is about 4471.2421093025. The cubic root of 19992006 is about 271.4055917493.

It can be divided in two parts, 1999 and 2006, that added together give a triangular number (4005 = T₈₉).

The spelling of 19992006 in words is "nineteen million, nine hundred ninety-two thousand, six".