13145204500 has 24 divisors (see below), whose sum is σ = 28709127720. Its totient is φ = 5258081600.

The previous prime is 13145204483. The next prime is 13145204551. The reversal of 13145204500 is 540254131.

It is a happy number.

13145204500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 634334596 + 12510869904 = 25186^2 + 111852^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13144705 + ... + 13145704.

It is an arithmetic number, because the mean of its divisors is an integer number (1196213655).

Almost surely, 2^13145204500 is an apocalyptic number.

13145204500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13145204500 is an abundant number, since it is smaller than the sum of its proper divisors (15563923220).

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

13145204500 is a wasteful number, since it uses less digits than its factorization.

13145204500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26290428 (or 26290416 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 13145204500 its reverse (540254131), we get a palindrome (13685458631).

The spelling of 13145204500 in words is "thirteen billion, one hundred forty-five million, two hundred four thousand, five hundred".