18216212154 has 128 divisors (see below), whose sum is σ = 43174010880. Its totient is φ = 5016646656.

The previous prime is 18216212141. The next prime is 18216212197. The reversal of 18216212154 is 45121261281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54053874 + ... + 54054210.

It is an arithmetic number, because the mean of its divisors is an integer number (337296960).

Almost surely, 2^18216212154 is an apocalyptic number.

18216212154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18216212154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21587005440).

18216212154 is an abundant number, since it is smaller than the sum of its proper divisors (24957798726).

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

18216212154 is a wasteful number, since it uses less digits than its factorization.

18216212154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its digits is 7680, while the sum is 33.

The spelling of 18216212154 in words is "eighteen billion, two hundred sixteen million, two hundred twelve thousand, one hundred fifty-four".