20053867 has 4 divisors (see below), whose sum is σ = 20520280. Its totient is φ = 19587456.

The previous prime is 20053841. The next prime is 20053871. The reversal of 20053867 is 76835002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20053867 - 2¹¹ = 20051819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20053367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233142 + ... + 233227.

It is an arithmetic number, because the mean of its divisors is an integer number (5130070).

Almost surely, 2^20053867 is an apocalyptic number.

20053867 is a deficient number, since it is larger than the sum of its proper divisors (466413).

20053867 is an equidigital number, since it uses as much as digits as its factorization.

20053867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466412.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20053867 is about 4478.1544189543. The cubic root of 20053867 is about 271.6852390898.

Adding to 20053867 its reverse (76835002), we get a palindrome (96888869).

The spelling of 20053867 in words is "twenty million, fifty-three thousand, eight hundred sixty-seven".