21310513230 has 32 divisors (see below), whose sum is σ = 51164445600. Its totient is φ = 5680668672.

The previous prime is 21310513181. The next prime is 21310513253. The reversal of 21310513230 is 3231501312.

It is a junction number, because it is equal to n+sod(n) for n = 21310513197 and 21310513206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51415 + ... + 212754.

It is an arithmetic number, because the mean of its divisors is an integer number (1598888925).

Almost surely, 2^21310513230 is an apocalyptic number.

21310513230 is an abundant number, since it is smaller than the sum of its proper divisors (29853932370).

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

21310513230 is a wasteful number, since it uses less digits than its factorization.

21310513230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266868.

The product of its (nonzero) digits is 540, while the sum is 21.

The spelling of 21310513230 in words is "twenty-one billion, three hundred ten million, five hundred thirteen thousand, two hundred thirty".