21013010310 has 64 divisors (see below), whose sum is σ = 53738085312. Its totient is φ = 5240242176.

The previous prime is 21013010287. The next prime is 21013010323. The reversal of 21013010310 is 1301031012.

It is a super-2 number, since 2×21013010310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 51147 + ... + 211286.

It is an arithmetic number, because the mean of its divisors is an integer number (839657583).

Almost surely, 2^21013010310 is an apocalyptic number.

21013010310 is an abundant number, since it is smaller than the sum of its proper divisors (32725075002).

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

21013010310 is a wasteful number, since it uses less digits than its factorization.

21013010310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262617.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21013010310 its reverse (1301031012), we get a palindrome (22314041322).

The spelling of 21013010310 in words is "twenty-one billion, thirteen million, ten thousand, three hundred ten".