218933397480 has 384 divisors, whose sum is σ = 785288908800. Its totient is φ = 48660208128.

The previous prime is 218933397457. The next prime is 218933397481. The reversal of 218933397480 is 84793339812.

It is a self number, because there is not a number n which added to its sum of digits gives 218933397480.

It is not an unprimeable number, because it can be changed into a prime (218933397481) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 60426949 + ... + 60430571.

It is an arithmetic number, because the mean of its divisors is an integer number (2045023200).

Almost surely, 2^218933397480 is an apocalyptic number.

218933397480 is a gapful number since it is divisible by the number (20) 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 218933397480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392644454400).

218933397480 is an abundant number, since it is smaller than the sum of its proper divisors (566355511320).

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

218933397480 is a wasteful number, since it uses less digits than its factorization.

218933397480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933 (or 3922 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 218933397480 in words is "two hundred eighteen billion, nine hundred thirty-three million, three hundred ninety-seven thousand, four hundred eighty".