2100405206 has 8 divisors (see below), whose sum is σ = 3158092704. Its totient is φ = 1047707640.

The previous prime is 2100405187. The next prime is 2100405239. The reversal of 2100405206 is 6025040012.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1246430 + ... + 1248113.

It is an arithmetic number, because the mean of its divisors is an integer number (394761588).

Almost surely, 2^2100405206 is an apocalyptic number.

2100405206 is a deficient number, since it is larger than the sum of its proper divisors (1057687498).

2100405206 is a wasteful number, since it uses less digits than its factorization.

2100405206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494966.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2100405206 is about 45830.1778962290. The cubic root of 2100405206 is about 1280.6615245097.

Adding to 2100405206 its reverse (6025040012), we get a palindrome (8125445218).

The spelling of 2100405206 in words is "two billion, one hundred million, four hundred five thousand, two hundred six".