30312078013 has 24 divisors (see below), whose sum is σ = 37197525120. Its totient is φ = 24560807040.

The previous prime is 30312077923. The next prime is 30312078019. The reversal of 30312078013 is 31087021303.

It is not a de Polignac number, because 30312078013 - 2²¹ = 30309980861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312078019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 395893 + ... + 466213.

It is an arithmetic number, because the mean of its divisors is an integer number (1549896880).

Almost surely, 2^30312078013 is an apocalyptic number.

It is an amenable number.

30312078013 is a deficient number, since it is larger than the sum of its proper divisors (6885447107).

30312078013 is a wasteful number, since it uses less digits than its factorization.

30312078013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70817 (or 70810 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 30312078013 its reverse (31087021303), we get a palindrome (61399099316).

The spelling of 30312078013 in words is "thirty billion, three hundred twelve million, seventy-eight thousand, thirteen".