218087020 has 12 divisors (see below), whose sum is σ = 457982784. Its totient is φ = 87234800.

The previous prime is 218086987. The next prime is 218087039. The reversal of 218087020 is 20780812.

It is a self number, because there is not a number n which added to its sum of digits gives 218087020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5452156 + ... + 5452195.

It is an arithmetic number, because the mean of its divisors is an integer number (38165232).

Almost surely, 2^218087020 is an apocalyptic number.

218087020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218087020 is an abundant number, since it is smaller than the sum of its proper divisors (239895764).

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

218087020 is a wasteful number, since it uses less digits than its factorization.

218087020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10904360 (or 10904358 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 218087020 is about 14767.7696352564. The cubic root of 218087020 is about 601.9262353373.

The spelling of 218087020 in words is "two hundred eighteen million, eighty-seven thousand, twenty".