2101914378 has 12 divisors (see below), whose sum is σ = 4554147858. Its totient is φ = 700638120.

The previous prime is 2101914377. The next prime is 2101914379. The reversal of 2101914378 is 8734191012.

It is a happy number.

2101914378 is a `hidden beast` number, since 210 + 1 + 9 + 1 + 437 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (2101914377) and next prime (2101914379).

It can be written as a sum of positive squares in only one way, i.e., 1955673729 + 146240649 = 44223^2 + 12093^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2101914371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58386493 + ... + 58386528.

Almost surely, 2^2101914378 is an apocalyptic number.

2101914378 is an abundant number, since it is smaller than the sum of its proper divisors (2452233480).

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

2101914378 is a wasteful number, since it uses less digits than its factorization.

2101914378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116773029 (or 116773026 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 2101914378 is about 45846.6397678172. The cubic root of 2101914378 is about 1280.9681757840.

The spelling of 2101914378 in words is "two billion, one hundred one million, nine hundred fourteen thousand, three hundred seventy-eight".