21203303010 has 64 divisors (see below), whose sum is σ = 52101384192. Its totient is φ = 5519537856.

The previous prime is 21203302999. The next prime is 21203303063. The reversal of 21203303010 is 1030330212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2946637 + ... + 2953823.

It is an arithmetic number, because the mean of its divisors is an integer number (814084128).

Almost surely, 2^21203303010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21203303010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26050692096).

21203303010 is an abundant number, since it is smaller than the sum of its proper divisors (30898081182).

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

21203303010 is a wasteful number, since it uses less digits than its factorization.

21203303010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9527.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21203303010 its reverse (1030330212), we get a palindrome (22233633222).

The spelling of 21203303010 in words is "twenty-one billion, two hundred three million, three hundred three thousand, ten".