18709422418 has 8 divisors (see below), whose sum is σ = 28077574140. Its totient is φ = 9350231040.

The previous prime is 18709422409. The next prime is 18709422419. The reversal of 18709422418 is 81422490781.

It can be written as a sum of positive squares in 2 ways, for example, as 12785503329 + 5923919089 = 113073^2 + 76967^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18709422419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2234863 + ... + 2243218.

Almost surely, 2^18709422418 is an apocalyptic number.

18709422418 is a deficient number, since it is larger than the sum of its proper divisors (9368151722).

18709422418 is a wasteful number, since it uses less digits than its factorization.

18709422418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4480172.

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 18709422418 in words is "eighteen billion, seven hundred nine million, four hundred twenty-two thousand, four hundred eighteen".