30305742818 has 54 divisors (see below), whose sum is σ = 52384344201. Its totient is φ = 13140850944.

The previous prime is 30305742799. The next prime is 30305742821. The reversal of 30305742818 is 81824750303.

It can be written as a sum of positive squares in 14 ways, for example, as 9096772129 + 21208970689 = 95377^2 + 145633^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=123097.

It is a super-2 number, since 2×30305742818² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 54408596 + ... + 54409152.

Almost surely, 2^30305742818 is an apocalyptic number.

30305742818 is a deficient number, since it is larger than the sum of its proper divisors (22078601383).

30305742818 is an equidigital number, since it uses as much as digits as its factorization.

30305742818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 30305742818 in words is "thirty billion, three hundred five million, seven hundred forty-two thousand, eight hundred eighteen".