30305138443018 has 4 divisors (see below), whose sum is σ = 45457707664530. Its totient is φ = 15152569221508.

The previous prime is 30305138442991. The next prime is 30305138443049. The reversal of 30305138443018 is 81034483150303.

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

It can be written as a sum of positive squares in only one way, i.e., 19904919789049 + 10400218653969 = 4461493^2 + 3224937^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7576284610753 + ... + 7576284610756.

Almost surely, 2^{30305138443018} is an apocalyptic number.

30305138443018 is a deficient number, since it is larger than the sum of its proper divisors (15152569221512).

30305138443018 is a wasteful number, since it uses less digits than its factorization.

30305138443018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15152569221511.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 30305138443018 in words is "thirty trillion, three hundred five billion, one hundred thirty-eight million, four hundred forty-three thousand, eighteen".