2108738205 has 80 divisors (see below), whose sum is σ = 4339319424. Its totient is φ = 963679680.

The previous prime is 2108738201. The next prime is 2108738209. The reversal of 2108738205 is 5028378012.

It is an interprime number because it is at equal distance from previous prime (2108738201) and next prime (2108738209).

It is not a de Polignac number, because 2108738205 - 2² = 2108738201 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2108738205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108738201) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 687375 + ... + 690435.

Almost surely, 2^2108738205 is an apocalyptic number.

It is an amenable number.

2108738205 is an abundant number, since it is smaller than the sum of its proper divisors (2230581219).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2108738205 is an frugal number, since it uses more digits than its factorization.

2108738205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100 (or 3076 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 2108738205 is about 45920.9996080225. Note that the first 3 decimals coincide. The cubic root of 2108738205 is about 1282.3528917139.

Adding to 2108738205 its sum of digits (36), we get a square (2108738241 = 45921²).

The spelling of 2108738205 in words is "two billion, one hundred eight million, seven hundred thirty-eight thousand, two hundred five".