2100918218394 has 8 divisors (see below), whose sum is σ = 4201836436800. Its totient is φ = 700306072796.

The previous prime is 2100918218351. The next prime is 2100918218401. The reversal of 2100918218394 is 4938128190012.

It is a happy number.

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

2100918218394 is an admirable 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, 175076518194 + ... + 175076518205.

It is an arithmetic number, because the mean of its divisors is an integer number (525229554600).

Almost surely, 2^{2100918218394} is an apocalyptic number.

2100918218394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2100918218394 is a wasteful number, since it uses less digits than its factorization.

2100918218394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350153036404.

The product of its (nonzero) digits is 248832, while the sum is 48.

The spelling of 2100918218394 in words is "two trillion, one hundred billion, nine hundred eighteen million, two hundred eighteen thousand, three hundred ninety-four".