2100948145 has 16 divisors (see below), whose sum is σ = 2709289728. Its totient is φ = 1558275840.

The previous prime is 2100948131. The next prime is 2100948163. The reversal of 2100948145 is 5418490012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2100948145 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100948145.

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 in 15 ways as a sum of consecutive naturals, for example, 178761 + ... + 190150.

It is an arithmetic number, because the mean of its divisors is an integer number (169330608).

Almost surely, 2^2100948145 is an apocalyptic number.

It is an amenable number.

2100948145 is a deficient number, since it is larger than the sum of its proper divisors (608341583).

2100948145 is a wasteful number, since it uses less digits than its factorization.

2100948145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369000.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2100948145 is about 45836.1008922007. The cubic root of 2100948145 is about 1280.7718621376.

The spelling of 2100948145 in words is "two billion, one hundred million, nine hundred forty-eight thousand, one hundred forty-five".