18226762008 has 128 divisors (see below), whose sum is σ = 56919851520. Its totient is φ = 4735272960.

The previous prime is 18226761989. The next prime is 18226762013. The reversal of 18226762008 is 80026762281.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84048 + ... + 208608.

It is an arithmetic number, because the mean of its divisors is an integer number (444686340).

Almost surely, 2^18226762008 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 18226762008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28459925760).

18226762008 is an abundant number, since it is smaller than the sum of its proper divisors (38693089512).

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

18226762008 is a wasteful number, since it uses less digits than its factorization.

18226762008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124657 (or 124653 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 18226762008 in words is "eighteen billion, two hundred twenty-six million, seven hundred sixty-two thousand, eight".