12045405620 has 24 divisors (see below), whose sum is σ = 25301289384. Its totient is φ = 4817031296.

The previous prime is 12045405587. The next prime is 12045405629. The reversal of 12045405620 is 2650454021.

It can be written as a sum of positive squares in 4 ways, for example, as 2714618404 + 9330787216 = 52102^2 + 96596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12045405629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19454 + ... + 156426.

It is an arithmetic number, because the mean of its divisors is an integer number (1054220391).

Almost surely, 2^12045405620 is an apocalyptic number.

12045405620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12045405620 is an abundant number, since it is smaller than the sum of its proper divisors (13255883764).

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

12045405620 is a wasteful number, since it uses less digits than its factorization.

12045405620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141379 (or 141377 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 12045405620 its reverse (2650454021), we get a palindrome (14695859641).

The spelling of 12045405620 in words is "twelve billion, forty-five million, four hundred five thousand, six hundred twenty".