2100750645 has 16 divisors (see below), whose sum is σ = 3841372800. Its totient is φ = 960343104.

The previous prime is 2100750583. The next prime is 2100750647. The reversal of 2100750645 is 5460570012.

It is not a de Polignac number, because 2100750645 - 2¹³ = 2100742453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100750647) by changing a digit.

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, 10003470 + ... + 10003679.

It is an arithmetic number, because the mean of its divisors is an integer number (240085800).

Almost surely, 2^2100750645 is an apocalyptic number.

It is an amenable number.

2100750645 is a deficient number, since it is larger than the sum of its proper divisors (1740622155).

2100750645 is a wasteful number, since it uses less digits than its factorization.

2100750645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20007164.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 2100750645 is about 45833.9464262025. The cubic root of 2100750645 is about 1280.7317278186.

The spelling of 2100750645 in words is "two billion, one hundred million, seven hundred fifty thousand, six hundred forty-five".