18613430784 has 120 divisors (see below), whose sum is σ = 57852086292. Its totient is φ = 5727191040.

The previous prime is 18613430761. The next prime is 18613430791. The reversal of 18613430784 is 48703431681.

It can be written as a sum of positive squares in 2 ways, for example, as 17563670784 + 1049760000 = 132528^2 + 32400^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95457 + ... + 215264.

Almost surely, 2^18613430784 is an apocalyptic number.

It is an amenable number.

18613430784 is an abundant number, since it is smaller than the sum of its proper divisors (39238655508).

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

18613430784 is a wasteful number, since it uses less digits than its factorization.

18613430784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310758 (or 310739 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 18613430784 in words is "eighteen billion, six hundred thirteen million, four hundred thirty thousand, seven hundred eighty-four".