20228087 has 8 divisors (see below), whose sum is σ = 22140432. Its totient is φ = 18328000.

The previous prime is 20228077. The next prime is 20228093. The reversal of 20228087 is 78082202.

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 20228087 - 2¹⁸ = 19965943 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 (20228057) 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, 587 + ... + 6387.

It is an arithmetic number, because the mean of its divisors is an integer number (2767554).

Almost surely, 2^20228087 is an apocalyptic number.

20228087 is a deficient number, since it is larger than the sum of its proper divisors (1912345).

20228087 is a wasteful number, since it uses less digits than its factorization.

20228087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6129.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 20228087 is about 4497.5645631831. The cubic root of 20228087 is about 272.4697359987.

The spelling of 20228087 in words is "twenty million, two hundred twenty-eight thousand, eighty-seven".