18005421214 has 12 divisors (see below), whose sum is σ = 29686624632. Its totient is φ = 8184282260.

The previous prime is 18005421199. The next prime is 18005421251. The reversal of 18005421214 is 41212450081.

It is a super-2 number, since 2×18005421214² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37201042 + ... + 37201525.

It is an arithmetic number, because the mean of its divisors is an integer number (2473885386).

Almost surely, 2^18005421214 is an apocalyptic number.

18005421214 is a deficient number, since it is larger than the sum of its proper divisors (11681203418).

18005421214 is a wasteful number, since it uses less digits than its factorization.

18005421214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74402591 (or 74402580 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

Adding to 18005421214 its reverse (41212450081), we get a palindrome (59217871295).

The spelling of 18005421214 in words is "eighteen billion, five million, four hundred twenty-one thousand, two hundred fourteen".