20055311 has 4 divisors (see below), whose sum is σ = 20354712. Its totient is φ = 19755912.

The previous prime is 20055289. The next prime is 20055313. The reversal of 20055311 is 11355002.

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 20055311 - 2⁶ = 20055247 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 20055311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149600 + ... + 149733.

It is an arithmetic number, because the mean of its divisors is an integer number (5088678).

Almost surely, 2^20055311 is an apocalyptic number.

20055311 is a deficient number, since it is larger than the sum of its proper divisors (299401).

20055311 is an equidigital number, since it uses as much as digits as its factorization.

20055311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299400.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 20055311 is about 4478.3156431855. The cubic root of 20055311 is about 271.6917599280.

The spelling of 20055311 in words is "twenty million, fifty-five thousand, three hundred eleven".