2102345445 has 16 divisors (see below), whose sum is σ = 3472261632. Its totient is φ = 1085081280.

The previous prime is 2102345437. The next prime is 2102345447. The reversal of 2102345445 is 5445432012.

It is not a de Polignac number, because 2102345445 - 2³ = 2102345437 is a prime.

It is a super-2 number, since 2×2102345445² = 8839712740224496050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102345447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2260122 + ... + 2261051.

It is an arithmetic number, because the mean of its divisors is an integer number (217016352).

Almost surely, 2^2102345445 is an apocalyptic number.

It is an amenable number.

2102345445 is a deficient number, since it is larger than the sum of its proper divisors (1369916187).

2102345445 is a wasteful number, since it uses less digits than its factorization.

2102345445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521212.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 2102345445 is about 45851.3407110414. The cubic root of 2102345445 is about 1281.0557380829.

Adding to 2102345445 its reverse (5445432012), we get a palindrome (7547777457).

The spelling of 2102345445 in words is "two billion, one hundred two million, three hundred forty-five thousand, four hundred forty-five".