20199467 has 4 divisors (see below), whose sum is σ = 20211360. Its totient is φ = 20187576.

The previous prime is 20199437. The next prime is 20199481. The reversal of 20199467 is 76499102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 76499102 = 2 ⋅38249551.

It is a cyclic number.

It is not a de Polignac number, because 20199467 - 2⁸ = 20199211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20199467.

It is not an unprimeable number, because it can be changed into a prime (20199427) 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 3 ways as a sum of consecutive naturals, for example, 2867 + ... + 6972.

It is an arithmetic number, because the mean of its divisors is an integer number (5052840).

Almost surely, 2^20199467 is an apocalyptic number.

20199467 is a deficient number, since it is larger than the sum of its proper divisors (11893).

20199467 is an equidigital number, since it uses as much as digits as its factorization.

20199467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11892.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 20199467 is about 4494.3817149859. The cubic root of 20199467 is about 272.3411727708.

The spelling of 20199467 in words is "twenty million, one hundred ninety-nine thousand, four hundred sixty-seven".