218812375380 has 48 divisors (see below), whose sum is σ = 613751503680. Its totient is φ = 58247409408.

The previous prime is 218812375339. The next prime is 218812375387. The reversal of 218812375380 is 83573218812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218812375387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3170494 + ... + 3238773.

It is an arithmetic number, because the mean of its divisors is an integer number (12786489660).

Almost surely, 2^218812375380 is an apocalyptic number.

218812375380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218812375380 is an abundant number, since it is smaller than the sum of its proper divisors (394939128300).

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

218812375380 is a wasteful number, since it uses less digits than its factorization.

218812375380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6409848 (or 6409846 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 218812375380 in words is "two hundred eighteen billion, eight hundred twelve million, three hundred seventy-five thousand, three hundred eighty".