21020330210 has 16 divisors (see below), whose sum is σ = 41276284992. Its totient is φ = 7643756400.

The previous prime is 21020330209. The next prime is 21020330237. The reversal of 21020330210 is 1203302012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95546846 + ... + 95547065.

It is an arithmetic number, because the mean of its divisors is an integer number (2579767812).

Almost surely, 2^21020330210 is an apocalyptic number.

21020330210 is a deficient number, since it is larger than the sum of its proper divisors (20255954782).

21020330210 is a wasteful number, since it uses less digits than its factorization.

21020330210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191093929.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21020330210 its reverse (1203302012), we get a palindrome (22223632222).

The spelling of 21020330210 in words is "twenty-one billion, twenty million, three hundred thirty thousand, two hundred ten".