2123004345 has 64 divisors (see below), whose sum is σ = 4277145600. Its totient is φ = 873504000.

The previous prime is 2123004307. The next prime is 2123004347. The reversal of 2123004345 is 5434003212.

It is not a de Polignac number, because 2123004345 - 2¹⁰ = 2123003321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123004347) 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 63 ways as a sum of consecutive naturals, for example, 107556 + ... + 125754.

It is an arithmetic number, because the mean of its divisors is an integer number (66830400).

Almost surely, 2^2123004345 is an apocalyptic number.

It is an amenable number.

2123004345 is an abundant number, since it is smaller than the sum of its proper divisors (2154141255).

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

2123004345 is a wasteful number, since it uses less digits than its factorization.

2123004345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18326.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2123004345 is about 46076.0712843445. The cubic root of 2123004345 is about 1285.2382072388.

Adding to 2123004345 its reverse (5434003212), we get a palindrome (7557007557).

The spelling of 2123004345 in words is "two billion, one hundred twenty-three million, four thousand, three hundred forty-five".