2105258378 has 4 divisors (see below), whose sum is σ = 3157887570. Its totient is φ = 1052629188.

The previous prime is 2105258347. The next prime is 2105258383. The reversal of 2105258378 is 8738525012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1578234529 + 527023849 = 39727^2 + 22957^2 .

It is a super-2 number, since 2×2105258378² = 8864225676278381768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526314593 + ... + 526314596.

Almost surely, 2^2105258378 is an apocalyptic number.

2105258378 is a deficient number, since it is larger than the sum of its proper divisors (1052629192).

2105258378 is a wasteful number, since it uses less digits than its factorization.

2105258378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052629191.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 2105258378 is about 45883.0946863875. The cubic root of 2105258378 is about 1281.6471263660.

The spelling of 2105258378 in words is "two billion, one hundred five million, two hundred fifty-eight thousand, three hundred seventy-eight".