21323285810 has 32 divisors (see below), whose sum is σ = 40843958400. Its totient is φ = 7987237632.

The previous prime is 21323285801. The next prime is 21323285821. The reversal of 21323285810 is 1858232312.

It is a super-2 number, since 2×21323285810² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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, 281324 + ... + 348983.

It is an arithmetic number, because the mean of its divisors is an integer number (1276373700).

Almost surely, 2^21323285810 is an apocalyptic number.

21323285810 is a deficient number, since it is larger than the sum of its proper divisors (19520672590).

21323285810 is a wasteful number, since it uses less digits than its factorization.

21323285810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630530.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 21323285810 in words is "twenty-one billion, three hundred twenty-three million, two hundred eighty-five thousand, eight hundred ten".