20199000 has 64 divisors (see below), whose sum is σ = 63030240. Its totient is φ = 5385600.

The previous prime is 20198999. The next prime is 20199007. The reversal of 20199000 is 99102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20199007) 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 15 ways as a sum of consecutive naturals, for example, 367 + ... + 6366.

Almost surely, 2^20199000 is an apocalyptic number.

20199000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20199000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31515120).

20199000 is an abundant number, since it is smaller than the sum of its proper divisors (42831240).

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

20199000 is a wasteful number, since it uses less digits than its factorization.

20199000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757 (or 6743 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 20199000 is about 4494.3297609321. The cubic root of 20199000 is about 272.3390739644.

The spelling of 20199000 in words is "twenty million, one hundred ninety-nine thousand".