21310213308 has 24 divisors (see below), whose sum is σ = 50880200448. Its totient is φ = 6938208816.

The previous prime is 21310213291. The next prime is 21310213313. The reversal of 21310213308 is 80331201312.

21310213308 is nontrivially palindromic in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20648916 + ... + 20649947.

It is an arithmetic number, because the mean of its divisors is an integer number (2120008352).

Almost surely, 2^21310213308 is an apocalyptic number.

It is an amenable number.

21310213308 is an abundant number, since it is smaller than the sum of its proper divisors (29569987140).

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

21310213308 is a wasteful number, since it uses less digits than its factorization.

21310213308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41298913 (or 41298911 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The spelling of 21310213308 in words is "twenty-one billion, three hundred ten million, two hundred thirteen thousand, three hundred eight".