20199368 has 36 divisors (see below), whose sum is σ = 44252235. Its totient is φ = 8618736.

The previous prime is 20199343. The next prime is 20199397. The reversal of 20199368 is 86399102.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 10099684 + 10099684 = 3178^2 + 3178^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3178.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 88871 + ... + 89097.

Almost surely, 2^20199368 is an apocalyptic number.

20199368 is a gapful number since it is divisible by the number (28) 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 20199368

20199368 is an abundant number, since it is smaller than the sum of its proper divisors (24052867).

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

20199368 is an equidigital number, since it uses as much as digits as its factorization.

20199368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 20199368 is about 4494.3707012217. The cubic root of 20199368 is about 272.3407278445.

Multiplying 20199368 by its product of nonzero digits (23328), we get a square (471210856704 = 686448²).

The spelling of 20199368 in words is "twenty million, one hundred ninety-nine thousand, three hundred sixty-eight".