20255887 has 4 divisors (see below), whose sum is σ = 20273800. Its totient is φ = 20237976.

The previous prime is 20255839. The next prime is 20255897. The reversal of 20255887 is 78855202.

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 20255887 - 2¹¹ = 20253839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20255897) 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, 7137 + ... + 9562.

It is an arithmetic number, because the mean of its divisors is an integer number (5068450).

Almost surely, 2^20255887 is an apocalyptic number.

20255887 is a deficient number, since it is larger than the sum of its proper divisors (17913).

20255887 is a wasteful number, since it uses less digits than its factorization.

20255887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17912.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 20255887 is about 4500.6540635779. The cubic root of 20255887 is about 272.5944996716.

The spelling of 20255887 in words is "twenty million, two hundred fifty-five thousand, eight hundred eighty-seven".