18268821480 has 512 divisors, whose sum is σ = 71530905600. Its totient is φ = 3624652800.

The previous prime is 18268821427. The next prime is 18268821481. The reversal of 18268821480 is 8412886281.

It is not an unprimeable number, because it can be changed into a prime (18268821481) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 39628450 + ... + 39628910.

It is an arithmetic number, because the mean of its divisors is an integer number (139708800).

Almost surely, 2^18268821480 is an apocalyptic number.

18268821480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18268821480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35765452800).

18268821480 is an abundant number, since it is smaller than the sum of its proper divisors (53262084120).

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

18268821480 is a wasteful number, since it uses less digits than its factorization.

18268821480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 48.

The spelling of 18268821480 in words is "eighteen billion, two hundred sixty-eight million, eight hundred twenty-one thousand, four hundred eighty".