18306230706 has 24 divisors (see below), whose sum is σ = 39673434684. Its totient is φ = 6100548480.

The previous prime is 18306230647. The next prime is 18306230707. The reversal of 18306230706 is 60703260381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18303654681 + 2576025 = 135291^2 + 1605^2 .

It is a super-2 number, since 2×18306230706² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18306230707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52315 + ... + 198366.

Almost surely, 2^18306230706 is an apocalyptic number.

18306230706 is an abundant number, since it is smaller than the sum of its proper divisors (21367203978).

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

18306230706 is a wasteful number, since it uses less digits than its factorization.

18306230706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254746 (or 254743 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 18306230706 in words is "eighteen billion, three hundred six million, two hundred thirty thousand, seven hundred six".