20028895 has 8 divisors (see below), whose sum is σ = 24060960. Its totient is φ = 16005600.

The previous prime is 20028893. The next prime is 20028901. The reversal of 20028895 is 59882002.

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

It is not a de Polignac number, because 20028895 - 2¹ = 20028893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20028895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20028893) 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, 4966 + ... + 8044.

It is an arithmetic number, because the mean of its divisors is an integer number (3007620).

Almost surely, 2^20028895 is an apocalyptic number.

20028895 is a deficient number, since it is larger than the sum of its proper divisors (4032065).

20028895 is a wasteful number, since it uses less digits than its factorization.

20028895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 20028895 is about 4475.3653482146. The cubic root of 20028895 is about 271.5724205849.

The spelling of 20028895 in words is "twenty million, twenty-eight thousand, eight hundred ninety-five".