216485020 has 12 divisors (see below), whose sum is σ = 454618584. Its totient is φ = 86594000.

The previous prime is 216485011. The next prime is 216485033. The reversal of 216485020 is 20584612.

It is a self number, because there is not a number n which added to its sum of digits gives 216485020.

It is a congruent number.

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, 5412106 + ... + 5412145.

It is an arithmetic number, because the mean of its divisors is an integer number (37884882).

Almost surely, 2^216485020 is an apocalyptic number.

216485020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216485020 is an abundant number, since it is smaller than the sum of its proper divisors (238133564).

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

216485020 is a wasteful number, since it uses less digits than its factorization.

216485020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10824260 (or 10824258 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 216485020 is about 14713.4299196346. The cubic root of 216485020 is about 600.4487568710.

The spelling of 216485020 in words is "two hundred sixteen million, four hundred eighty-five thousand, twenty".