21153330210 has 16 divisors (see below), whose sum is σ = 50767992576. Its totient is φ = 5640888048.

The previous prime is 21153330179. The next prime is 21153330217. The reversal of 21153330210 is 1203335112.

It is not an unprimeable number, because it can be changed into a prime (21153330217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352555474 + ... + 352555533.

It is an arithmetic number, because the mean of its divisors is an integer number (3172999536).

Almost surely, 2^21153330210 is an apocalyptic number.

21153330210 is an abundant number, since it is smaller than the sum of its proper divisors (29614662366).

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

21153330210 is a wasteful number, since it uses less digits than its factorization.

21153330210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705111017.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21153330210 its reverse (1203335112), we get a palindrome (22356665322).

The spelling of 21153330210 in words is "twenty-one billion, one hundred fifty-three million, three hundred thirty thousand, two hundred ten".