2130669945 has 12 divisors (see below), whose sum is σ = 3693161316. Its totient is φ = 1136357280.

The previous prime is 2130669913. The next prime is 2130669949. The reversal of 2130669945 is 5499660312.

It can be written as a sum of positive squares in 2 ways, for example, as 1604242809 + 526427136 = 40053^2 + 22944^2 .

It is not a de Polignac number, because 2130669945 - 2⁵ = 2130669913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 47348221 = 2130669945 / (2 + 1 + 3 + 0 + 6 + 6 + 9 + 9 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 2130669945.

It is not an unprimeable number, because it can be changed into a prime (2130669949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23674066 + ... + 23674155.

It is an arithmetic number, because the mean of its divisors is an integer number (307763443).

Almost surely, 2^2130669945 is an apocalyptic number.

It is an amenable number.

2130669945 is a deficient number, since it is larger than the sum of its proper divisors (1562491371).

2130669945 is a wasteful number, since it uses less digits than its factorization.

2130669945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47348232 (or 47348229 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 2130669945 is about 46159.1805061572. The cubic root of 2130669945 is about 1286.7832328001.

The spelling of 2130669945 in words is "two billion, one hundred thirty million, six hundred sixty-nine thousand, nine hundred forty-five".