12305005040 has 20 divisors (see below), whose sum is σ = 28609136904. Its totient is φ = 4922001984.

The previous prime is 12305004977. The next prime is 12305005067. The reversal of 12305005040 is 4050050321.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 76906202 + ... + 76906361.

Almost surely, 2^12305005040 is an apocalyptic number.

12305005040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12305005040 is an abundant number, since it is smaller than the sum of its proper divisors (16304131864).

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

12305005040 is a wasteful number, since it uses less digits than its factorization.

12305005040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153812576 (or 153812570 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 12305005040 its reverse (4050050321), we get a palindrome (16355055361).

The spelling of 12305005040 in words is "twelve billion, three hundred five million, five thousand, forty".