18305227698 has 8 divisors (see below), whose sum is σ = 36610455408. Its totient is φ = 6101742564.

The previous prime is 18305227693. The next prime is 18305227711. The reversal of 18305227698 is 89672250381.

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

18305227698 is an admirable number.

It is a super-2 number, since 2×18305227698² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18305227698.

It is not an unprimeable number, because it can be changed into a prime (18305227691) 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, 1525435636 + ... + 1525435647.

It is an arithmetic number, because the mean of its divisors is an integer number (4576306926).

Almost surely, 2^18305227698 is an apocalyptic number.

18305227698 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18305227698 is a wasteful number, since it uses less digits than its factorization.

18305227698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050871288.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 18305227698 in words is "eighteen billion, three hundred five million, two hundred twenty-seven thousand, six hundred ninety-eight".