20199369 has 4 divisors (see below), whose sum is σ = 26932496. Its totient is φ = 13466244.

The previous prime is 20199343. The next prime is 20199397. The reversal of 20199369 is 96399102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20199369 - 2¹¹ = 20197321 is a prime.

It is a super-2 number, since 2×20199369² = 816029015996322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20199329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366559 + ... + 3366564.

It is an arithmetic number, because the mean of its divisors is an integer number (6733124).

Almost surely, 2^20199369 is an apocalyptic number.

It is an amenable number.

20199369 is a deficient number, since it is larger than the sum of its proper divisors (6733127).

20199369 is an equidigital number, since it uses as much as digits as its factorization.

20199369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733126.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 20199369 is about 4494.3708124720. The cubic root of 20199369 is about 272.3407323387.

The spelling of 20199369 in words is "twenty million, one hundred ninety-nine thousand, three hundred sixty-nine".