20053891 has 8 divisors (see below), whose sum is σ = 23559984. Its totient is φ = 16828320.

The previous prime is 20053883. The next prime is 20053927. The reversal of 20053891 is 19835002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20053891 - 2³ = 20053883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20053801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69976 + ... + 70261.

It is an arithmetic number, because the mean of its divisors is an integer number (2944998).

Almost surely, 2^20053891 is an apocalyptic number.

20053891 is a deficient number, since it is larger than the sum of its proper divisors (3506093).

20053891 is a wasteful number, since it uses less digits than its factorization.

20053891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140261.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 20053891 is about 4478.1570986289. The cubic root of 20053891 is about 271.6853474719.

Adding to 20053891 its reverse (19835002), we get a palindrome (39888893).

The spelling of 20053891 in words is "twenty million, fifty-three thousand, eight hundred ninety-one".