21203302010 has 32 divisors (see below), whose sum is σ = 42137226432. Its totient is φ = 7617393280.

The previous prime is 21203302009. The next prime is 21203302019. The reversal of 21203302010 is 1020330212.

It is a happy number.

It is a super-2 number, since 2×21203302010² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21203302019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1152059 + ... + 1170318.

It is an arithmetic number, because the mean of its divisors is an integer number (1316788326).

Almost surely, 2^21203302010 is an apocalyptic number.

21203302010 is a deficient number, since it is larger than the sum of its proper divisors (20933924422).

21203302010 is a wasteful number, since it uses less digits than its factorization.

21203302010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322478.

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

Adding to 21203302010 its reverse (1020330212), we get a palindrome (22223632222).

The spelling of 21203302010 in words is "twenty-one billion, two hundred three million, three hundred two thousand, ten".