21033330210 has 64 divisors (see below), whose sum is σ = 56465424000. Its totient is φ = 5571233856.

The previous prime is 21033330187. The next prime is 21033330233. The reversal of 21033330210 is 1203333012.

21033330210 is a `hidden beast` number, since 21 + 0 + 333 + 302 + 10 = 666.

It is an interprime number because it is at equal distance from previous prime (21033330187) and next prime (21033330233).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221184 + ... + 301643.

It is an arithmetic number, because the mean of its divisors is an integer number (882272250).

Almost surely, 2^21033330210 is an apocalyptic number.

21033330210 is an abundant number, since it is smaller than the sum of its proper divisors (35432093790).

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

21033330210 is a wasteful number, since it uses less digits than its factorization.

21033330210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522992 (or 522986 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21033330210 its reverse (1203333012), we get a palindrome (22236663222).

The spelling of 21033330210 in words is "twenty-one billion, thirty-three million, three hundred thirty thousand, two hundred ten".