20199600 has 180 divisors, whose sum is σ = 72759232. Its totient is φ = 5184000.

The previous prime is 20199583. The next prime is 20199617. The reversal of 20199600 is 699102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20199583) and next prime (20199617).

It is a tau number, because it is divible by the number of its divisors (180).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 111510 + ... + 111690.

Almost surely, 2^20199600 is an apocalyptic number.

20199600 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 20199600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36379616).

20199600 is an abundant number, since it is smaller than the sum of its proper divisors (52559632).

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

20199600 is a wasteful number, since it uses less digits than its factorization.

20199600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 20199600 is about 4494.3965112126. The cubic root of 20199600 is about 272.3417704977.

The spelling of 20199600 in words is "twenty million, one hundred ninety-nine thousand, six hundred".