2102424845 has 4 divisors (see below), whose sum is σ = 2522909820. Its totient is φ = 1681939872.

The previous prime is 2102424823. The next prime is 2102424869. The reversal of 2102424845 is 5484242012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1112756164 + 989668681 = 33358^2 + 31459^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102424845 - 2⁶ = 2102424781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210242480 + ... + 210242489.

It is an arithmetic number, because the mean of its divisors is an integer number (630727455).

Almost surely, 2^2102424845 is an apocalyptic number.

It is an amenable number.

2102424845 is a deficient number, since it is larger than the sum of its proper divisors (420484975).

2102424845 is an equidigital number, since it uses as much as digits as its factorization.

2102424845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420484974.

The product of its (nonzero) digits is 20480, while the sum is 32.

The square root of 2102424845 is about 45852.2065445056. The cubic root of 2102424845 is about 1281.0718652367.

Adding to 2102424845 its reverse (5484242012), we get a palindrome (7586666857).

The spelling of 2102424845 in words is "two billion, one hundred two million, four hundred twenty-four thousand, eight hundred forty-five".