18226538088 has 128 divisors (see below), whose sum is σ = 50713344000. Its totient is φ = 5412625920.

The previous prime is 18226538081. The next prime is 18226538093. The reversal of 18226538088 is 88083562281.

It is a self number, because there is not a number n which added to its sum of digits gives 18226538088.

It is not an unprimeable number, because it can be changed into a prime (18226538081) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2854083 + ... + 2860461.

It is an arithmetic number, because the mean of its divisors is an integer number (396198000).

Almost surely, 2^18226538088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18226538088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25356672000).

18226538088 is an abundant number, since it is smaller than the sum of its proper divisors (32486805912).

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

18226538088 is a wasteful number, since it uses less digits than its factorization.

18226538088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6615 (or 6611 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 51.

It can be divided in two parts, 1822653 and 8088, that added together give a triangular number (1830741 = T₁₉₁₃).

The spelling of 18226538088 in words is "eighteen billion, two hundred twenty-six million, five hundred thirty-eight thousand, eighty-eight".