18421580708 has 6 divisors (see below), whose sum is σ = 32237766246. Its totient is φ = 9210790352.

The previous prime is 18421580699. The next prime is 18421580711. The reversal of 18421580708 is 80708512481.

It can be written as a sum of positive squares in only one way, i.e., 18417746944 + 3833764 = 135712^2 + 1958^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2302697585 + ... + 2302697592.

It is an arithmetic number, because the mean of its divisors is an integer number (5372961041).

Almost surely, 2^18421580708 is an apocalyptic number.

It is an amenable number.

18421580708 is a deficient number, since it is larger than the sum of its proper divisors (13816185538).

18421580708 is a wasteful number, since it uses less digits than its factorization.

18421580708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4605395181 (or 4605395179 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 44.

The spelling of 18421580708 in words is "eighteen billion, four hundred twenty-one million, five hundred eighty thousand, seven hundred eight".