20002105 has 8 divisors (see below), whose sum is σ = 24109632. Its totient is φ = 15930288.

The previous prime is 20002097. The next prime is 20002123. The reversal of 20002105 is 50120002.

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 20002105 - 2³ = 20002097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002091 and 20002100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7677 + ... + 9946.

It is an arithmetic number, because the mean of its divisors is an integer number (3013704).

Almost surely, 2^20002105 is an apocalyptic number.

It is an amenable number.

20002105 is a deficient number, since it is larger than the sum of its proper divisors (4107527).

20002105 is a wasteful number, since it uses less digits than its factorization.

20002105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17855.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 20002105 is about 4472.3712949620. The cubic root of 20002105 is about 271.4512844072.

Adding to 20002105 its reverse (50120002), we get a palindrome (70122107).

The spelling of 20002105 in words is "twenty million, two thousand, one hundred five".