20053805 has 8 divisors (see below), whose sum is σ = 24472800. Its totient is φ = 15770896.

The previous prime is 20053801. The next prime is 20053841. The reversal of 20053805 is 50835002.

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 20053805 - 2² = 20053801 is a prime.

It is a super-3 number, since 3×20053805³ (a number of 23 digits) contains 333 as substring.

It is a congruent 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, 33695 + ... + 34284.

It is an arithmetic number, because the mean of its divisors is an integer number (3059100).

Almost surely, 2^20053805 is an apocalyptic number.

It is an amenable number.

20053805 is a deficient number, since it is larger than the sum of its proper divisors (4418995).

20053805 is an equidigital number, since it uses as much as digits as its factorization.

20053805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68043.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20053805 is about 4478.1474964543. The cubic root of 20053805 is about 271.6849591022.

Adding to 20053805 its reverse (50835002), we get a palindrome (70888807).

The spelling of 20053805 in words is "twenty million, fifty-three thousand, eight hundred five".