213110020 has 12 divisors (see below), whose sum is σ = 447531084. Its totient is φ = 85244000.

The previous prime is 213109993. The next prime is 213110033. The reversal of 213110020 is 20011312.

It can be written as a sum of positive squares in 2 ways, for example, as 29073664 + 184036356 = 5392^2 + 13566^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 213109979 and 213110006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5327731 + ... + 5327770.

It is an arithmetic number, because the mean of its divisors is an integer number (37294257).

Almost surely, 2^213110020 is an apocalyptic number.

213110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213110020 is an abundant number, since it is smaller than the sum of its proper divisors (234421064).

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

213110020 is a wasteful number, since it uses less digits than its factorization.

213110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655510 (or 10655508 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 213110020 is about 14598.2882558196. The cubic root of 213110020 is about 597.3120689521.

Adding to 213110020 its reverse (20011312), we get a palindrome (233121332).

The spelling of 213110020 in words is "two hundred thirteen million, one hundred ten thousand, twenty".