20001095 has 8 divisors (see below), whose sum is σ = 25413264. Its totient is φ = 15059584.

The previous prime is 20001083. The next prime is 20001139. The reversal of 20001095 is 59010002.

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 20001095 - 2⁶ = 20001031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117569 + ... + 117738.

It is an arithmetic number, because the mean of its divisors is an integer number (3176658).

Almost surely, 2^20001095 is an apocalyptic number.

20001095 is a deficient number, since it is larger than the sum of its proper divisors (5412169).

20001095 is a wasteful number, since it uses less digits than its factorization.

20001095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235329.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 20001095 is about 4472.2583780457. The cubic root of 20001095 is about 271.4467153812.

Adding to 20001095 its reverse (59010002), we get a palindrome (79011097).

The spelling of 20001095 in words is "twenty million, one thousand, ninety-five".